We can't do anything but leave them to their HP, MyBetterWorld
I read many of your posts before.
I am so so glad, he is not living with you anymore.
As Bernadette says "the past is gone..we are free in this moment"
When I was small like 6 or so I met my father's wife and it was traumatic, not even alcohol was involved and not even other kids were involved so I support what others have already said. What makes things convenient for him doesn't mean you have to do them.