DD is 15 1/2.. quite naive & young for her age.. recently a family friends son has become her bf.. he's just 16 nice respectful lad (her 1st bf)
He lives some distance away & she's asked if he can come & stay soon for a few days..
We've had the grown up chat about going to GP & sorting out the Pill (she was mortified) but that's not enough for me to think it won't happen & I don't want to take a chance incase they get carried away. WWYD?
Also I'm thinking as she is underage he will definitely be in a separate bedroom at night but obviously it could still happen while I'm at work.. had the don't feel pressured into anything chat & if he is a decent lad he'll wait TIL you're ready... it's such a hard thing for me to think about as obviously nobody wants to think about their daughter in that way but I'm trying to view things sensibly & responsibly.. any advice welcome on how we let our dd's grow up 
Background I'm a LP her dad lives 60 miles away not spoken to him about it all as we don't have a great relationship
Help!!