He explained the situation

"When I got home, mother was already drunk," Matt explained. "And she started whining about how dad never spanked her like her own father did."

"Yeah, Grandpa Joe is a pervert."

"Huh?"

"Come on. Didn't you notice how he was always patting the girls on their asses and giving these long sermons on how young girls are leading virtuous men into temptation?"

"Uh, no."

She sighed. "That's because you're a guy, I guess. If some guy gets sexually exploited it's like a big deal. But if it's a girl, they probably had it coming. But you didn't answer my question. Mom doesn't look like she got a spanking, she looks like you're treating her like a puppy."

"I figured if I gave her a spanking like she wanted, she'd just act out more to get more spankings."

"That's seriously weird thinking."

"Well, maybe I wasn't thinking that clearly."

"Speaking of not thinking that clearly, what the hell were you thinking telling everyone at school your plan but not even mentioning it to me?"