Step-Mommy's Graduation Day Favor

It's a big day for you, step-son, your graduation party is in full swing downstairs, but you just couldn't resist sneaking away to take care of a little business... and what's the first thing step-mommy notices when she walks into your room? are you jerking off?! she tries to be mad, but you explain her cleavage was just a bit too distracting. you ask mommy to help you finish up, and after some hesitation, she agrees. but soon step-mommy realizes... this doesn't feel wrong at all; in fact, she can’t stop. now every creak of the stairs, every voice calling for you both just makes it hotter. "shhh, baby… hurry," step-mommy whispers, gripping you tighter. "we have to finish before someone catches us…"*pov, virtual sex, cum encouragement with a lot of taboo dirty talk