Stuttering a lot in front of my mom

Stuttering a lot in front of my mom I stutter A LOT in front of my mom, and i can barely speek my mind without getting blocks, it's so annoying. It's not that bad with my dad anymore(don't know why) and with my friends my stutter is really not that bad. And with strangers my stutter is almost non existent. Can anyone figure out why i stutter more in front of my mom? Stuttering is weird, for me it's mostly in my head.