No. Most teens aren’t ready for anything close to a mature friendship. According to current research, the brain continues to develop into a person’s 20s. Mothers often want to befriend their daughters; fathers, their sons. But this is not in anyone’s best interest. Teenagers need to form identities distinct from their parents. That means: lots of privacy, even some secrets. It’s usually easier for a teenage girl to befriend the friend of her mother, and it’s usually best for the mother to leave it at that.