17yo ds has asked if his gf can stay the night. They've been a couple for about 4 months. My instinct is to say yes (but keep the noise down). Dh is struggling with it. He admits that it's a further growing-up step that he wasn't ready for.
He asks, what about the gf, is it up to us to decide for her? What about how her parents might feel about this? We don't know her parents, have just met briefly, on the odd occasions when they picked her up from us. She's the same age as ds.