Teen parents can be responsible and still, at times, act like teenagers. Don't fault them for acting their age when it is appropriate. Sometimes young parents are jealous of caregivers. The attention and affection given to their children may make them fear loss of love from their babies. Show that you recognize them as the most important person in the baby's life.
Most teens are eager to learn.
The key is to watch for opportunities. Share your view with respect. You may find the teachable moments occur more often. Also, you may learn some things from the teen parents. We all need someone to talk to and share good news with, to encourage us, and to just listen when we are feeling low.