Sister drop over the edge Help!!

Well so much were to start.I come from a family of 5 girls and 1 boy he is the oldes(Grandparents took him away from them and raised him)..Our Parents were not the best and not the worst..they didn't take us to church or teach us of our lord..They smoked pot and drank alot and did other things that children should not see. Now that we are all grown and married they are what i will call ..Use the bible to the way they want it too work for them and change things to better suite them not by the true word ..but i do know in my heart they loved us in there own way..We did get drunken beatings and so did our mother from our father and we as childern tried to help our mother..
I am the middle child.. I became the mother hen to the younger ones i took the to church they were saved and baptize..and went on to be sunday school teachers.My 2 older sisters have passed away heart probles at a young age of 6 and 22..so now i only have 2 sisters left the younger ones..Now here is the BIG trouble i have now..My sister we will call T knows our lord and the word very well and knows right from wrong..She was married wanted another child told her husband he said no so she told him she would go find her a man to be her babys daddy..We all thought she was kidding...NOPE she did just that..She is married to a doctor and the babys daddy is also a doctor so these are not stupid men.Now her husband is 23 years older than her and the babys daddy is 11 years younger then her. She has both men last name on the birth..after 2 years she gets a divorice but still see both men and now a new one has been added he is her lawer..I know it's hard to belive this..The child is now 4 and he thinks he has 2 daddys..I guess so..I have been praying and talking with her over these years but she can do know wrong were all wrong she think this..She tells lies alot and is not taking care of her son she thinks we all should do what ever she says..She like to walk over people and be in control..Well the other day she was at mom house mother and her had words she hit my mother and drew blood..My other sister showed up and made her leave..Now she cant stand when we tell her how wrong she is living and now i think she has gone too far. I had my mother call the police.. She did . My husband thinks that we all need to cut her from us and have nothing to do with her until she see her ways..i think he right but the thought of losesing another sister breaks my heart.. I think thats why i let her do some of the bad things she dose to me..I could go on on she has done alot more things to us ..I need some in sight on what to do iam praying...

I can sleep over this..I need to keep praying till i get peace

[ibchacha]

Well sister, you've got the right idea as for prayer; keep it before the Lord. I believe I'd be just as conflicted if it were me and my sister too.
It's just an opinion; but I wouldn't cut her completely off, I'd just treat her with a long handle spoon.(love her from a distance)
~I pray that God blesses you to make the right decisions in your circumstance; that He would be a God in the midst of it. May he give you the right words to speak and the right actions to take; in Jesus' name, amen.

Thanks you for the prayer i need all i can get