My apparent best "friend" basically set out to steal my husband...she manipulated us both, played on our weaknesses, played us off against each other and we separated after a string of rows that we have since discovered were mostly caused by her telling us different things.
When we were separated her and my DH slept together....I am feeling very betrayed by him as well obviously, but we are working through it...we were in a bad place, it was a one off when we were separated and he has done nothing but try and make it up to me.
Since then she has shown herself to be rather unstable...admitted to people her agenda was to steal my DH from me, pretended she was pregnant etc etc, lied about abortions/stillbirth among a million other things.
People can call me silly but I know my DH (I'm prepared for a flaming, I posted quite openly in Relationships). It was so out of character for him and I feel we have something worth saving....but she was my best friend...when we first split she looked me in my eye and told me she'd help me through all of this...
I know someone will come along and say they are equally responsible....for the act of them sleeping together...yes they are....I believe from my husband's part it was a one off mistake and if I get even a tiny little whiff of anything else ever he is out on his ear and he knows that...but HER...all she has done since is try and wind me up....using my and her children's friendship to guilt trip me....harassed my DH...she just LIES constantly...I have more than enough proof of this....
GRRRRRRRRRRRRRR rant over...I know people will think my DH is getting off light, but he's not. I don't know if we will ever fully regain that trust, but I feel it's worth a try as only I fully know the situation...