Is this the case of Worst Best Friend Ever?

I do not think I will ever have a female friend EVER! I had ran back in touch with an old friend from school, in these apartments i moved in. My husband stays at work so I am an house wife, I had begin to get a little bored. So I begin to gain trust in this so called LaTonya J. friend. We would go to the malls, wal-mart, clothes stores and eat out with the kids and all. She had my husband and me thinking she was single, so I said to her "God will bless you with a great husband someday you just be patient and wait and I will pray for you". So today September 25, 2008 I receieved a call from a private number at 5am in the morning saying he said she said blah blah, you tell laTonya she better stop sleeping with my sister husband or there will be consequences and my sister got a gun. As I picked my mouth up from sobbering on the pillows and picking chunks of crust out my eyes, lol, I was like UHN? What, I am sorry repeat that please? I have a slidest clue what yall are talking about?? Then, a guy got on the phone saying that girl (LaTonya) knew 4 months ago when she started messing with Reggie he was married with child. I said well why are yall calling and telling me this, I dont know Reggie and I won't be knowing LaTonya if this is true. So being a friend I called her and her mother asking them what's going on. Her mother pretty much had already knew her daughter laTonya was sleeping and dating a man that stayed with another woman.Both of them was quiet and speechless. GUILT! LaTonya on the phone after 10 mins of silence started denying it all with no surprised or shocked voice saying well i guess i got to face the consequences and deal with whats coming. So I told her I cannot be her friend no more with that kind of life style. Next thing I know her sister & mother calling me saying I'm wrong 4 not wanting 2 B a part of this and I should not believe other people. But the text message she sent in my phone she said she was wrong and he told her otherwise. I told her not to put me in her mess, I dont like people that do that, next thing I know LaTonya will try to sleep with my husband or my friends husband or my sister husband. She is known in the past to sleep with friends boyfriends, why should i stay friends with someone i cannot trust and has a negative bad past? These people that know about LaTonya adultery has said stuff about her adultress ways behind close doors and when I wasnt paying attention it was happening in my face all along. Meaning when I look back standing outside waiting the kids at the bus stop she was talking about a guy she meet in the apartments and how his baby mam and him was suppose to be breaking up and such. So I confronted her about it and asked her why and how could she put me and my family in jeopardy over her not keeping her legs closed and then she fliped things over saying she grown and she could do whatever she want and I got no business telling her mother nothing. So she is on my no friends list forever. I will never open my spiritual heart to an friend again only my family, because no matter what happens they will always be family. What do you think about this situation?