Oldest DD is 16 in 2 weeks time, she's been with her BF 10 months. They often hang out at each-other's houses, getting picked up just before bedtime. She wanted to go there tomorrow, I said I would want to pick her up a bit earlier so we can relax and have a drink afterwards. She then showed me a video her BF sent her of his mother saying that she was very welcome to stay the night and that she is OK with this if I am. We've not actually properly met his mother but we take it in turns to pick up and drop them off and DD is fond of her. I think just his mam and sister will be there and his best friend until midnight as he lives next door.
She asked me if she could stay over his a few months ago but we said no. But now she's been with him a bit longer and is 16 very soon, I really don't know what to do. DP not really happy with it but he was heading out the door when I mentioned it so not spoken with him properly about it yet. We were exactly one year older and it was also NYE when I was 16 almost 17 when I first stayed at DP's so feels a bit mean saying no when we did the same at similar ages. Although one year younger is a big difference at that age. She said they could stay in separate rooms but I wouldn't bet my life on that happening. Help me decide mumsnetters!