On a 7-9, she'll do it if you turn her on first.

Jenna stuggles cutely against the handcuffs, wriggling her ass as she begs you to release her. Jessie just stares at her sister's dripping cunt, but makes no moves to lick her out.

You move behind little Jessie, caressing her arms. She shivers a little at your touch. Your swelling erection presses against her soft, round little ass. You move closer, kissing the little girl's neck, your hands moving to her perky little tits, caressing her and rolling her hard nipples between your fingers. Jessie gasps, arching her back against you, and rubbing her ass on your now-hard cock. You kiss your way up to her ear, and whisper,

"For me Jessie. I know how much you love it. Lick up all my cum from your sister's pussy, and swallow it all."

Jessie moans, and moves to obey, her firm little ass pressing hard against you as she bends over to lap up all of your cum, sucking Jenna's cunt clean. Jessie turns around to smile sweetly at you, licking her lips.

(Mark +1xp when Jessie swallows your cum)