DS2 (18 in less than 1 month) has been seeing a girl (17 1/2) for about 2 weeks. She's been round quite a few days and up into his room to watch TV together. She seems lovely.
Tonight, DS told us he was going to meet her to go for a walk. I asked if he would stay at hers for a bit after and he said no, he wasn't allowed in her house. We asked why and it's basically because he's a boy.
On my way to drop him off, he asked if she could stay over tomorrow night. I told him I'd have to think about it and that while I wasn't worried about that (he's pretty sensible), I was worried about her parents being worried about that. I get the impression she's just going to say she's staying at a friend's house. I'm feeling on the verge of being complicit in a lie, if I say yes. AIBU (or would I be unreasonable - I haven't given an answer yet) to refuse her staying on that basis?