Worried

Worried I don’t know where my son is learning these things I’m worried thinking maybe my 4 year old son saw me throw the window of my bedroom having sex because well he sleeps with his grandma and yesterday him and the baby were standing and he pretended to put his thing dancing in front of her but he was wearing underwear the baby is 9 months. I don’t know where he learned that he broke my window a bit and there’s a chair in the kitchen connecting to my window near my window of my bedroom the baby sleeps in her own room. And the other day she was laying down and he stranded up pretending to put his thing on her face but he was wearing a diaper of course. It was with my husband I live with my husband he has his own bed in her room he is attached to her I live with my grandma