Already posted about it in chat but I'd really like yoour opinion re DH and I rather what to say to dd.
So, dd (18yo) is preparing for her A levels. Obvioulsy she should be full on in the middle of her revisions. Her mocks were ok but not as good as they could have been. She also has a bf and wants to spend time with him. She is doing a competitive sport so is busy a lot (most) of the weekends because of that.
That's for the background.
DH and I have a difference of opinion on how what to say to dd when she wants to go out (lets say friday evening with friends or staying at her bf).
I think she is 18yo. it's up to her to decide what to do. I am worried that (like a lot of students!) she'll leave it too late to do everything but after that, I want to leave her to it.
DH thinks it is disgraceful she is going out like this. He has an issue with her going out because he basically thinks she is lazy/she should be at her desk revising. On the other side, he doesn't have any issue with her doing her sport and spending all the weekend doing that, even taking time out of school. He is actually encouraging that! 
Now we've had lots of arguments around that. I explained to him dd is 18yo, blabla. I think it's damaging our relationhsip woth dd and I am happy with that. He won't listen and will have a go at dd (or me!) each time she asking us to go out.
dd is always coming to me rather than DH when she wants to go out. I really want to answer the way I want to ('Yes of course. When will you be back?').
But is that appropriate? (Im thinking the whole presenting a united front to dd, being on the same page etc...)