E.C.
I can imagine that it is frustrating raising boys on your own. First I would like to say that although it sounds like you might be having a hard time you seem to be going the right path. Being consistent with adolscents is important. Just because it seems like he is less concerned with consequences it really does bother him when you ground him. That is most likely his way of trying to make you feel intimidated. It doesnt matter your size always remember you are the parent and what you say goes. Don't show him that you are intimidated because if he senses that he will continue to push your buttons. This is the time where teenagers like to test but you must always stand your ground. Don't forget to also talk to him about the reasons you ground or punish him. Hope this helps but it sounds like you are a very involved parent and that is wonderful.