Sarah quickly only feels one thing: Arousal

Sarah couldn't help herself. Even as she was emotionally torn between sadness and anger, she was unable to look away, unable to tear her eyes away from the two sexy bodies in front of her.
Her focus mainly shifted between her boyfriends ass rocking back and forth, and the enticingly inviting pussy of her rival, which came into view for a short moment every time when the quarterback's dick was almost fully withdrawn, only to disappear again, accompanied by loud grunts and moans.
And before she knew it, any negative feelings about the infidelity of her boyfriend had been overshadowed and replaced by her own growing arousal, as she could feel her girl-cock swelling again, growing and expanding under her increasingly tight black dress.

"Fuck, your pussy is so tight!" Mark groaned.

"Only because your cock is so big! God, I just love a big cock!" Madison moaned.

Sarah couldn't help but to smirk at this statement. Sure, in the past, she had enjoyed Mark's dick as well. With around 6 inches Sarah guessed that it was above average sized. But now, as she watched it thrusting in and out of Madison's pussy, the futanari knew that it paled in both size and girth compared to her own appendage.
But who was she kidding? Any normal sized male penis would look absolutely tiny in direct comparison to her own truly astonishing girl-cock, which she felt twitching and throbbing as it reached the underside of her breasts, the hot shaft still firmly held in place, pressed to her stomach and chest by the tightness of her increasingly constricting dress. And her cock was still growing bigger, still getting harder.

"Oh fuck. I'm going to cum!" Mark exclaimed.

"Not yet! I'm not nearly there yet! C'mon Stud, keep going!" Madison spurned him on.

"No way, your pussy is squeezing me so tight. I'm gonna blow my load any second now! Where do you want it?"

"Urgh, fine! I want it..."