I don't want my stepdaughter to sleep in my bed with me and my wife when she has nightmares
Can you explain to me why you don't want her to sleep with you if she has nightmares?
I could tell you, but the past is the past
You should be willing to comfort children when they are scared. Maybe you could just let her sleep in the bed with her mother while you go somewhere else.
I didn't marry the kid, I'm only helping my wife. She can sleep with the kid.
Usually parents comfort children that have nightmares. Don't you want the child to know her parents are there for her?