I don't think Mums ever stop worrying about their children whatever age they are. When my daughter lived at home I liked to know if she'd be back as we had old fashioned bolts on the inside of the front/back doors, and I'd 'lock up'.
I think asking for a text is reasonable, you can relax then and sleep - just don't be upset if she does turn up in the early hours!
34 year old assisted euthanasia
Static caravan purchase is it worth buying