First I'll try to link my post from nearly 2 years ago :
www.mumsnet.com/Talk/relationships/1764751-Am-I-deluding-myself-long-sorry
Why am I still here, you may wonder? Fear, weakness, worn down by repeated abuse,all the usual reasons, even a warped sense of love.
But tonight I learned that 6 years ago he made a move on our 15/16?year old babysitter when he was dropping her home. My neighbour, who is friends with the mother, told me. I shook when I heard, it's the way I react to every revelation of his appalling behaviour. I feel ashamed that he did this. I have asked if the mother will speak to me when she's back from holiday. I want her to tell me what he did and then I want to tell him he is a shameful fucking sleazeball with no respect for women whatsoever. And then, finally, I will tell him I've had enough, no more. I just hope my sons are not too damaged, that he has not destroyed our lives, that the babysitter is ok (I always wondered why she suddenly stopped coming) and that has no influence in the way they grow up to treat women.
I'm going to live a pretence for the next week until the babysitters mum returns from holiday. My poor boys, how have I inflicted such a shit of a father on them? 
How should I handle this? I want to confront him, but how and when? Will this repeated abusive behaviour have a bearing in the divorce? I don't want him as a role model for the boys. I also think there are likely to be other young women, I think maybe he lost many jobs because of his sexual incontinence. You'll see what happened to one job if you read my old post.
Advice, handholding or a kick up the arse all appreciated. I can't speak to anyone in RL about this, except my neighbour