She has not slept with him, she is just in love with him. He is not even aware of her feelings.
I am 100% positive of that.

When and if she begins any kind of relationship with him, then it is over with physical contact.

Me38,W36,D9
M 10y, R 14y

10/11/2015 wants to leave
25/12/2015 definitely wants to leave, makes plans
Jan 2016 started DBing
Feb 2016 sleeping in separate rooms
Sep 2016 sleeping in same room