Size competition

"I wanna see how much bigger she is than you!"

Josh stumbles at the thought "I dont wanna compare cocks to my sister. And thats little sister, not big sister."

"Oh babe, dont get so jealous. And besides, whats a size competition with just penises?"

She moves swiftly. Coming right up to Josh's face "besides, I'll do that thing you like of you indulge me a little"

The competition starts with height. As usual, josh stood at a tall 6'2"