SS5 last night informs my BD13 and I that when he used to go to my FH's X's house (not SS5's mom) afterschool for her to babysit him that her current BF at the time would make him...even push him sometimes when he refused to..upstairs and "play". FH's "baby" would be upstairs already in his crib. I sat him down and talked to him very nurturing and calmly and asked him to tell me what happened. SS has a habit of making up some stuff sometimes so before I told FH I wanted to make sure that SS was not "exagerrating". He told me that my FH's BM (not SS mom) would make him go upstairs and play while her and her BF were downstairs. If he whined that he didn't want to they would yell at him and her BF at the time would actually push him up there. I was INFURIATED. My SS to me in my heart is mine (his real BM is not around and he knows nothing of her). I wanted to go to BM's house and PUSH her and find that loser BF of hers and push him DOWN the stairs! I already thought of her as a lazy pig..not I think of her as a REAL pig.
SS said a few times he came down and saw them "going up and down on the couch and kissing". She lives with her mom and her mom works during the day so we all know what they were doing while kids were "upstairs".

When FH came home I sat him down and told him and he again asked SS a few questions (we didn't want to interrogate the poor child)..and he told FH the same thing. FH was fuming. I don't know if he is going to confront BM or not, but he told me that SS5 will NEVER go near her again..not even at a drop/off pickup.