Attempt to hide his growing erection

Chris tried to move his hands to cover his rapidly enlarging cock, but his attempt was completely transparent to the girls.

"Oh, please. It's obvious you're getting off on this." Lisa laughed at him.

Chris looked up at her guiltily, but tried to deny it. "No, of course I'm not."

"Just look at it!" Lisa pointed down at his cock, which was getting even harder as she teased him. "It's obvious you love becoming a girly girl."

Chris didn't know what to say -- his penis was definitely betraying him.

"Guys are so transparent," added Beth.

"I don't see any guys here. Just a bad girl who won't do what she's told." Sally had a wicked grin on her face. "Hey girls, what do you suppose we should do about that?"