all i want to say (as a mother) that sometimes we divorce a man because there are other issues and mom want to keep you out of this shit.. for instance, my ex FIL was a pedophile i divorced from my son's dad because of this situation and my ex (son's dad) would still let this pedophile in my son's life .. i left for that reason.. i never told my son cause he was never Hurt by his grandpa (who is disseased now) and so i don't want to ruin my son's vision of his grandad. his dad and New wife are talking bad about me about this whole situation. i don't do anything to correct the story cause then i would have to tell my son the truth. just to say sometimes mothers do stuff that looks fucked up but maybe it's not complete like that. if she was always an increddible mum, give her a chance to be that mom. although i realy understand your feelings of betrayel.