You guys ever been mocked my a parent?

You guys ever been mocked my a parent? I'm asking this cause my dad mocked my stutter and laughed. What happened was it was my mums birthday so I go to say happy birthday to her but I stutter and ended up saying happy 3 times. My dad then mocked me and proceeded to laugh. Like what?!?! I didn't know what to say so I just carried on with the day but I can't get it out of my mind that my dad out of all people mocked me. It sucks and hurts knowing that my dad's capable of that.