I understand you concern, and I have some scriptures that you should take a look at.
First of all, you need to know one of the ways in which the things written in the Old Testament apply in this day and time. Because there are many truths there regarding false prophets.
[b]For whatsoever things were written aforetime were written for our learning,[/b] that we through patience and comfort of the scriptures might have hope.
1 Cor 10: 5 But with many of them God was not well pleased: for they were overthrown in the wilderness.
6 [b] these things were our examples,[/b] the intent we should not lust after evil things, as they also lusted.
7 Neither be ye idolaters, as were some of them; as it is written, The people sat down to eat and drink, and rose up to play.
8 Neither let us commit fornication, as some of them committed, and fell in one day three and twenty thousand.
Neither let us tempt Christ, as some of them also tempted, and were destroyed of serpents.
10 Neither murmur ye, as some of them also murmured, and were destroyed of the destroyer.
11 [b]Now all these things happened unto them for ensamples: AND THEY ARE WRITTEN FOR OUR ADMONITION,(warning)upon whom the ends of the world are come.
12 Wherefore let him that thinketh he standeth take heed lest he fall.[/b]
13 There hath no temptation taken you but such as is common to man: but God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it.
14 [b]Wherefore, my dearly beloved, flee from idolatry.[/b]
It is the covetousness that these men practice and teach that is idolatry.
Now many quote the verses regarding if a thing comes to pass it is of the Lord, but there is another set of verses very similar, showing that even if something comes to pass it is not of the Lord.
Deut. Chapter 13
1 If there arise among you a prophet, or a dreamer of dreams, and giveth thee a sign or a wonder,
2 And the sign or the wonder come to pass, whereof he spake unto thee, saying, Let us go after other gods, which thou hast not known, and let us serve them;
(The other god they serve today is "mammon".)
3 Thou shalt not hearken unto the words of that prophet, or that dreamer of dreams:[b] for the LORD your God proveth you, to know whether ye love the LORD your God with all your heart and with all your soul.[/b]
(God is proving all of us, by allowing these men to preach these things, without falling down dead in the pulpits. Your mother and sister need to know, that God allows false teachers and prophets to PROVE THEM.)
4 Ye shall walk after the LORD your God, and fear him, and keep his commandments, and obey his voice, and ye shall serve him, and cleave unto him.
5 And that prophet, or that dreamer of dreams, shall be put to death; because he hath spoken to turn you away from the LORD your God, which brought you out of the land of Egypt, and redeemed you out of the house of bondage, to thrust thee out of the way which the LORD thy God commanded thee to walk in. So shalt thou put the evil away from the midst of thee.
6 If thy brother, the son of thy mother, or thy son, or thy daughter, or the wife of thy bosom, or thy friend, which is as thine own soul, entice thee secretly, saying, Let us go and serve other gods, which thou hast not known, thou, nor thy fathers;
7 Namely, of the gods of the people which are round about you, nigh unto thee, or far off from thee, from the one end of the earth even unto the other end of the earth;
8 Thou shalt not consent unto him, nor hearken unto him; neither shall thine eye pity him, neither shalt thou spare, neither shalt thou conceal him:
But thou shalt surely kill him; thine hand shall be first upon him to put him to death, and afterwards the hand of all the people.
10 And thou shalt stone him with stones, that he die; because he hath sought to thrust thee away from the LORD thy God, which brought thee out of the land of Egypt, from the house of bondage.
11 And all Israel shall hear, and fear, and shall do no more any such wickedness as this is among you.
Now of course we don't stone people in this day and time. And these things as you saw were done to them, but ARE WRITTEN TO WARN US, that we should not do as the did.
Now remember that in these end times, there will be another gospel, another spirit and another Jesus. And the truth is that most of these men worship mammon and turn God's house into a house of mechandise.
1 Cor 11:2 For I am jealous over you with godly jealousy: for I have espoused you to one husband, that I may present you as a chaste virgin to Christ.
3 But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ.
4 [b]For if he that cometh preacheth another Jesus, whom we have not preached, or if ye receive another spirit, which ye have not received, or another gospel, which ye have not accepted, ye might well bear with him.[/b]
And again in Galatians, that there will be "another gospel", which at face value does not "seem" to people like another gospel.
Gal 1:6 I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel:
7 Which is not another; but there be some that trouble you, and would pervert the gospel of Christ.
8 But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
9 As we said before, so say I now again, if any man preach any other gospel unto you than that ye have received, let him be accursed.
2 Peter 2:1 But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.
2 And many shall follow their pernicious ways; by reason of whom the way of truth shall be evil spoken of.
3[b] And through covetousness shall they with feigned words make merchandise of you: whose judgment now of a long time lingereth not, and their damnation slumbereth not.[/b]
The ministries of these men are soley based on covetousness and worshiping mammon or material goods and wealth.
The fact is that we are warned in these last days, that this will be the state of things.
Jer 9:4 [b]Take ye heed every one of his neighbour, and trust ye not in any brother: for every brother will utterly supplant, and every neighbour will walk with slanders.[/b]
Even the most sincere in this day and time, have been deceived in one area or another. We have after all inheriied a corrupt church system and 2000 years of idolatrous theology, that corrupts and turns us from the truth. But God is faithful, to those who have a love of the truth, to eventually if they keep their head in the word, lead them out of Babylon, the harlot church.
Why do these things happen? Why do people follow lies? First of course because there are no good shepards, and secondly because they want to. Anyone who truly is called and hears his voice will eventually come out of deception. The Lord allows these things to prove our hearts. Again my sheep hear my voice, and the voice of a stranger they will not follow.
However how can they hear his voice if no one is speaking for him? Now we have the wittness of the Word, but they deceive and corrupt the hearts of the simple and "silly women".
2 Tim 3:1 This know also, that in the last days perilous times shall come.
2 For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,
3 Without natural affection, trucebreakers, false accusers, incontinent, fierce, despisers of those that are good,
4 Traitors, heady, highminded, lovers of pleasures more than lovers of God;
5 Having a form of godliness, but denying the power thereof: from such turn away.
6[b] For of this sort are they which creep into houses, and lead captive silly women laden with sins, led away with divers lusts,[/b]
7 Ever learning, and never able to come to the knowledge of the truth.
You sister is led away because of her own sin, her own lust to want a "rich husband". I mean why not just a "godly husband", why a "rich husband"? Because this is what these men teach, that God wants you to be rich. But what does the Word say?
1 Tim 6:7
For we brought nothing into this world, and it is certain we can carry nothing out.
8 And having food and raiment let us be therewith content.
9[b] But they that will be rich[/b] fall into temptation and a snare, and into many foolish and hurtful lusts, which drown men in destruction and perdition.
10 [b]For the love of money is the root of all evil: which while some coveted after, they have erred from the faith,[/b] and pierced themselves through with many sorrows.
11 [b]But thou, O man of God, flee these things; and follow after righteousness, godliness, faith, love, patience, meekness.[/b]
How can they hear the truth without someone to tell them. Obviously God wants you to take a stand. Here is a word from the Lord for you.
Eze 3:17 Son of man, I have made thee a watchman unto the house of Israel: therefore hear the word at my mouth, and give them warning from me.
18 [b]When I say unto the wicked, Thou shalt surely die; and thou givest him not warning, nor speakest to warn the wicked from his wicked way, to save his life; the same wicked man shall die in his iniquity; but his blood will I require at thine hand.[/b]
19 Yet if thou warn the wicked, and he turn not from his wickedness, nor from his wicked way, he shall die in his iniquity; but thou hast delivered thy soul.
20 Again, When a righteous man doth turn from his righteousness, and commit iniquity, and I lay a stumbling-block before him, he shall die: because thou hast not given him warning, he shall die in his sin, and his righteousness which he hath done shall not be remembered; but his blood will I require at thine hand.
21 Nevertheless if thou warn the righteous man, that the righteous sin not, and he doth not sin, he shall surely live, because he is warned; also thou hast delivered thy soul.
It's these words, meaning all the scriptures that I have shared with you here, that are "a word from a prophet", that your mother, your sister and you need to take heed to.
God has obviously made YOU the watchment on the wall. The question is what will you do?
So what about this so called prophet in Dallas?
OK. How about a 16 month prison term for Tax Evasion. Taking $100,000.00 from Church money to buy a house.
Now he says Jesus and the apostles were in prison, but NOT for Tax evasion, but for preacing another belief in a "Theocracy". And what does the real "word from the Lord" say? Give no appearance of evil. And it would be good for you to look up the qualifications of Church leaders in Timothy and Titus, that they were to have a "good report" of them that were without, meaning unbelievers, so that they did not shame God and his gospel. And that they were to be BLAMElESS.
Here is a "Word from the Lord for them", on that regards.
1 Peter 4:12 Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:
13 But rejoice, inasmuch as ye are partakers of Christ's sufferings; that, when his glory shall be revealed, ye may be glad also with exceeding joy.
14 If ye be reproached for the name of Christ, happy are ye; for the spirit of glory and of God resteth upon you: on their part he is evil spoken of, but on your part he is glorified.
15[b] But let none of you suffer as a murderer, OR AS A THIEF, or as an evildoer, or as a busybody in other men's matters.[/b]
16 Yet if any man suffer as a Christian, let him not be ashamed; but let him glorify God on this behalf.
He definately was not "suffering as a Christian", but for not rendering unto Washington's what was Washingtons. Hence he was suffering NOT for Christ, but as a THIEF.
But these guys can follow the tax laws, and still be an abomination to God's laws. Just because someone follows the "laws" of the U.S. does not make them right on with God's Word. After all it's legal to make and buy pronography and book on witchcraft, so they can we do that too?
But here is the problem, and I always say, that you can't have a leader without followers. The main problem is not the leaders, the main problem is the "followers".
[b] But this people hath a revolting and a rebellious heart; they are revolted and gone.[/b]
24 Neither say they in their heart, Let us now fear the LORD our God, that giveth rain, both the former and the latter, in his season: he reserveth unto us the appointed weeks of the harvest.
25 [b]Your iniquities have turned away these things, and your sins have withholden good things from you.[/b]
26 For among my people are found wicked men: they lay wait, as he that setteth snares; they set a trap, they catch men.
27 As a cage is full of birds, so are their houses full of deceit: therefore they are become great, and waxen rich.
28 They are waxen fat, they shine: yea, they overpass the deeds of the wicked: they judge not the cause, the cause of the fatherless, yet they prosper; and the right of the needy do they not judge.
29 Shall I not visit for these things? saith the LORD: shall not my soul be avenged on such a nation as this?
30 A wonderful and horrible thing is committed in the land;
Jer 5:31 The prophets prophesy falsely, and the priests bear rule by their means; and my people love to have it so: and what will ye do in the end thereof?
This prohecy was for THIS TIME!
The FACT is that most of the people who support these ministers have never come to repentance. No good thing will God withhold from them that love him. But instead of loving God, by learning and obeying the gospel of his son, they have a false prosperity gospel. It's easier to believe and follow these guys than to truly follow Jesus christ.
You must speak and stand on the Word and speak and show these scriptures to you mother and sister. Then you have done your part and all you can do is stand yourself, and pray that God will be merciful to them and give them repentance to the acknowledgement of the truth.