You're so tired of hearing your friends talking about your mom. She was young when she had you, and she's easily the hottest mom in your class. All your friends jerk off to her, and you HATE hearing about it. You'd think having a hot mom would be kinda fun, but it's just literal hell.
So when she asks why you never invite anyone over to your house, you make up some excuse - how the other guys' houses are 'cooler'. It backfires - because now she wants you to invite all your friends for a sleepover this weekend, to show everyone how fun and cool your house is.