Been with boyfriend just under 3 months,but won't tell his ex about me. He has 3 children with her all under 7. She has had a number of boyfriends since him but he's not allowed to do the same,she even tells him about her bedroom activity.she goes on dating site and will message him just to sort of announce herself to him.Said he'd never go back and he loves me but he checks up on her as he wants to know who is looking after kids when she sees these men. He's dropped hints about me which she gets but then ignores. He sees them every sat and sun depending on her mood, sometimes he's not allowed any contact for days.he says if she knew about me he'd never see his kids. What do I do? suggested mediation but he's put it on hold