Hi, I really need to hear from some parents of teens.
My 16YO son didn't come home last night. He has a girlfriend of 3 weeks and has been asking for sleepovers. We have said no sleep overs but curfew of 12pm. He was really upset about it but we talked and talked & thought he moved on. All other parents I know with 16YO's have similar curfews & do not allow sleepovers at boy/girlfriends. The girls mother has told him he can stay the night despite knowing our rules. I find that so disrespectful. 
We have spoken endlessly with DS about respect/relationships/sex/alcohol/drugs etc. We did expect he'd experiment with all of the above, I just wish he hadn't so young to be honest but that's done & I'm not angry about it.
He has anxiety & is seeing a Psych.
Sorry for disjointed question/info. I've been up for 4 hours (6am here) & I know he's going to walk in the door soon & I just need some clarity on how to deal with him. I just want to give a bit of back story.
& What the hell do I say to the mother if she drops him home. (I know what I'd like to say but that wouldn't work out for anyone!)
Please Help. :(
Thanks for reading.