I'm just concerned that she might get you arrested.
I adore my dad, I don't sleep with him.
I believe she listened to him because he had verbally and physically abused her for over thirteen years and that messed her up in the head.
I am just having this weird feeling that he is master minding something.
As for what to say to your son could you say you are just not seeing him for a while or would he ask questions? It may not be safe to have him around your child.