If you think your child is in an abusive relationship, I think the natural reaction from a parent is, "I'm going to get involved. I'm going to take control." I think that's the worst thing you can do. If you suspect your child is in an abusive relationship, the best thing you can do is just ask them. "I've noticed this about you." "I've noticed this behavior." "I heard that phone call, are you okay?" The most important thing you can do is make sure that young person has the ability to communicate what they need in that moment. Maybe they are not ready to leave that relationship, and you are telling them that you are not going to see them anymore. You're not going to out. If you are not making sure that your teen is having a say in what they want to be in this relationship, it can be the worst thing way. You will actually shut down any communication or conversation with your teen and they will not trust to you to come to you, if they do want to leave the relationship.