This is long so I apologise.
My ex and I have been split up for a couple of years now, we get on fine, he has contact with our child at my home every weekend, with me there, because he has no where else to take him, he has been sofa surfing since he split up with his last girlfriend.
His last girlfriend was 16 when they started seeing each other, he had known her all his life. She is a very vulnerable girl who had been and still was under the care of social services. His sister (exSIL) worked with the girl previously as she works in a care role and warned him when he started seeing her that she had a history of making false sexual abuse allegations against the staff where she lived.
They had a very volatile relationship and on one occasion she contacted me to tell me that he had cheated on me with her. When she was 13 years old. She told me a family occasion that I hadn't been at when the rape (because although that's not what she called it, that's what it is) took place.
He denies it ever happened.
Now she has since made other allegations which are definitely not true, she rang his employer saying he was using his work van to do drug runs. She tells everyone he was having an affair with me (definitely not) so she lacks credibility.
However when we were together he did look at teen porn. When I questioned this he said they were all 18/19 so not like it was illegal. it has always stuck in my mind though especially since he started seeing a 16 year old.
Anyway I will get to the point. He is now seeing a new girlfriend, it has been a matter of weeks and he has pretty much moved in with her, he works away most of the week but has been staying at hers whenever she he is home.
The thing is, this woman has 4 daughters, the eldest of which is almost 13.
Now I really don't want to believe that he is some kind of child abuser but what his ex has said is making me really uneasy and now he has moved in with a vulnerable single mum with easy access to a teenage girl.
Am I being hysterical or making a mountain out of a molehill? Do I do anything? What? keep out of it?