My mother was overprotective, I used to think that it was because on some level she cared about me, even though she treated me badly.
Now I've just had a moment. Her over protectiveness was nothing to do with concern for me, it was all about CONTROL she HAD to have control at all times.
She didn't want me to have friends or enjoy myself she liked me miserable, she liked the power to crushed and destroy. She enjoyed the fact that she could destroy my life.
So I think a 'overprotective' mother is an abuser.
Or maybe an engulfer who wants you all to herself.