Your mother can t make you break up with your girlfriend, it s up to you to obey or ignore her requests. My mom wants me to breakup with my bf but I don't want to break up. My dad wants me to break up with my current girlfriend because he has found me someone else.
But she could resent the girlfriend and not let you see it. It happens all of the time when a son finds a gal he likes that the mother may not quite