Don't be too hard on your mom. I myself, as a straight father of four, can tell you that I would be knocked out about it.
I would be asking myself if I did a bad job as a parent, and how will this affect the happiness of my child?
I would wonder if it's just a stage that will pass if I don't accept it.
I don't think that most people are that way by choice and have to learn to live with it.
I think it would be wise to be very discreet about it. An "in your face" attitude will just cause things to be said that will hurt for a long time.