No, he hasn't said whether it's serious or not. I brought that up and told him when it is serious, then it becomes a different story, but in my dd's eyes, she's a stranger right now. If it serious, then he's sending mixed signals to my dd, b/c he told her the woman is not his girlfriend, she's just a friend.
I informed him last night that I do not mind if they take her places or watch movies together or whatever, but absolutely no sleepovers while my dd is there. I told him if he's serious about her and she plans on moving in, they get engaged or married, then it becomes an altogether different story. He claimed there is no difference.

It's just like having a guy friend sleep on the couch while she's there.
Oh, I've been biting my tongue on alot of things for over a year now. I'm used to it.