They split last year after she'd spent most of their 7 year marriage stealing money from him, stealing his credit cards, pawning their children's jewellry and using the money to call her boyfriend, friends and family in the philippines (£80 a day mobile phone habit). He increased the mortgage by an extra £60k to cover all the debt she accrued. She'd 'left' the home several times, once when their 2 year old son had a broken leg. He finally filed for divorce last summer when she stole their sons' necklaces for the second time and pawned them. The week after she flipped and beat up their eldest son (6 at the time) so that his face was covered in bruises.
They spent last summer at my house where me and my husband looked after them for five weeks to protect them from their crazy mother (who we suspected would try to abduct them as she was very unstable at the time).
We also found out that she'd been working as a prostitute. Despite demanding custody of the kids, she refused to find herself a job where she could get a flat and have a stable home for the kids to visit (once things had calmed down). Instead she eventually found a job as a live in domestic and stayed at friends houses on the weekends that she was granted supervised contact.
During the past year, me, my husband, my sister and my mum (his first wife) have all rallied round to help make it as easy for him as possible so that he wouldn't crumble from the stress of looking after two young kids. He even tried to get back with my mum at one point, which she was willing to do (even though she'd divorced him for being such a monster to her during their marriage) - for the sake of the 'family' being re-united. I'd helped find him a solicitor, helped him fill out all the forms he needed to, found him an au-pair (and paid the agency finder's fee), even hired a private detective to gather evidence on her prostitution so he would have a better chance of getting custody.
After doing everything we thought we could to get him back on his feet, he's complained that no-one's around to look after the kids on the weekend and needs his ex-wife for this. But I've since found out that he's not only seeing her on the weekends, but she's been in the house, in his car and god knows what else. I've already told him that if she gets pregnant again he's lost everything.
He's let everyone down and he's let that poisonous bitch back into our family. I want to cut him off, but I feel like I'd be letting my brothers down if I do. I'm ttc at the moment, so also feel like I should just let him get on with it and concentrate on my own future family (and deny my unborn children their useless grandfather).