Anyone else had to deal with this. I'm long term separated from EXW and my DS (just 11) recently told me one evening (quite upset) that when at his mum's house he heard a noise and went downstairs and saw his mum and her partner at it on the kitchen table. He didn't disturb and left, and she still doesn't know.
He knows about the birds and bees and so we have had the talk about how it is a loving thing, and not just a procreation thing, so that confusion seems abated and he seems to be content now that he wasn't witnessing an assault. But he was very upset by it.
Thoughts: let it lie with her or mention it?