Take her top off

"No, no, that's okay," you nervously stammer as you stroke your dick inches from the face of your girlfriend's younger, hotter sister. After a few moments, you say, "Maybe if you took your top off?"

Sara looks up at you from her position on her knees in front of you--*right where she belongs,* you think--and she quickly nods. "Of course!" And she swiftly yanks her shirt up over her head and tosses it aside, revealing her perfect teen tits.

You moan audibly. Even with her gigantic breasts, Sara didn't need a bra. They jiggled beautifully as she settled back onto her heels.

The ferocity of your jerking increases as your eyes drill tunnels into Sara's chest.

She cups her hands under her tits and lifts them slightly. "So, you like these, huh?" she says teasingly. And at that she gives them a little shake.

As you watch her nipples bounce, you feel your balls start to boil.

"Oh, fuck, Sara, I'm... I'm... NNNNGG!" And your dick erupts.