It's grueling!

"Eh!" You groan as you hold up the weights as Barbara bounces up and down on your cock.

"Hold those weights up!" Sharon screams, "I want see you hold them till she cums."

"Mmph! I'm not there yet!" Barbara says as she rubs her pussy.

Sharon swaps her hand, "He doesn't need no help."

She then looks at you, "Come on! You don't want your lady friend to do all the work! Fuck her! The sooner she cums the sooner you can let go."

You grit your teeth as you start to thrust your cock into her.

"Hmmp, I'm feeling something." Barbara moans.

"That's what I like to see! Keep that up! Don't let go till she cums!"

You start to scream as you bounce your cock into Barbara, as your arms feel as if they are on fire, not knowing how long you could keep this up.