The law does not take a stand on who may hang out at the mall together, go to the movies or school events, sit with at the basketball game, etc. The law is only concerned with sexual conduct. Since you have not indicated your state, I can only advise that her wisest move would be to keep all her clothes on.

She is a minor. If her parents give her permission to date this guy she may. If her parents do not give her permission she may not. It really is that simple.

She should ask herself, however, why a 23 year old is unable to find companionship with someone his own age.