Bully flirted with her and steadily brought her to the edge. To the point where your mom voluntarily spreads her pussy lips and begs him to fuck her. He fucked her in every part of the house. Still they couldn't get enough of it.
Your bully acted like he's your friend infront of your mom. Two visits to your house and now he's fucking her after drinks. Everyone in school now knows that your mom spreads her pussy for him.
Bully: I told you to stay away from my girlfriend's pussy (your mom) or you'll get punished. Your mom fucked your toothbrush and said she's gonna spank you if you don't brush your teeth as well. Either way you lose. Such is the life of a wimp.
Your Mom felt like a real woman for the first time in ages . His big cock moved deep into her pussy and touched places that even your dad couldn't reach. She doesn't care if he bullies you. She's his cumslut for life now.