Dd (nearly 17) has been dating a lovely boy, a few months younger than her, for 18 months. He used to live a mile or so away from us but moved around 30 miles away last summer. His mum is extremely strict, he's never allowed out socially, and therefore they hardly ever get to see each other. When they do, it's when she's away with work, he'll get the train over, I'll collect him, they'll spend the day together then I'll drop him back early evening. This has however only happened twice since they moved. It was easier when he wasn't so far away as he could pop over for an hour or so after college.
Anyway dd has asked if he can stay the night sometime so they'll have more time together. It will be strictly separate bedrooms & if I found them in the same bedroom it would be the last time. But I feel a bit uneasy going against what his mum says, even though I kind of already have by allowing him here in the first place. Dd is just very upset as she rarely sees him. Any advice please?