Bro B notices alright

Bro B looked her dead in the eye and sneered. "Oh yeah, this one's ready to get filled. Chet, clear some space on the Wall of Shame."

Lisa's sisters were near to tears with laughter.

"Oh no, douchebag boy's going to fill you up!" squealed Beth.

"What face are you going to make for the Wall of Shame, sis?" jibed Felicia.

Bro B ignored their teasing. "You were right about the animal planet thing, babe. You're the filly, and I'm the stallion". And with that he pulled down his board shorts exposing his fully erect cock.