Grab Louise's gorgeous behind.

Her breast still in one hand, John slowly lifted his other from the table beside him, placing it carefully on Louise's waist. Her chest felt amazing under his grip, of course, but he had another target in mind that had been missing some attention.

He looked at his lap where her hand continued to roll up and down his shaft, before slowly moving his own grip from her waist, slowly along her tights, and behind, until he was cupping one of her cheeks in his hand.

Squeezing both hands, he almost ejaculated at the mere thought of having one of his little sister's breasts in one hand, her bumcheek in the other. He pulled their bodies closer as she continued to jerk him off and he fondled her.

A small, excited gasp escaped her lips, and John felt a familiar ache beneath her grip. He held off, instead getting another idea while his hands were where they were.

He moved his hand back up to her waist, fingering the elastic edge of her tights. Carefully, he pulled them down a little, remembering the car ride here and what she'd shown him.

Sure enough, the same pink, lacy panties were still wrapped around her waist. He looked at the underwear, and, after she nodded her permission through lustful eyes, he pulled the tights down even further to her thighs, exposing her entire groin and the pink panties to the room.

The sight of her lacy pink underwear, along with her breast in his hand and her own grip still pumping waves of pleasure through his groin, was enough to send him past the point of no return.