I think the not being allowed to give you're phone number out is sketchy. Is she allowed to have friends over? I tend to be the type of person who assumes the worst, but that doesnt sound normal to me and it makes me think her parents are trying to hide something.

It's important to protect your kids, but it's also important to know when to let go. I think my parents did a good job with knowing when to let go and when to hold on, although I often didnt think so at the time.