Cock slit!

Brittany moved forward toward Tim, his face frozen with a mixture of fear and arousal. Fist size gobs of precum dripped from Brittany's she pole.

As she slowly closed the gap, Brittany reached out and stroked the monster cock with one hand, while squeezing a breast with the other. A milky stream spewed forth, striking Tim in his gaping maw.

Tim tried in vain to retreat further, forgetting the countertop blocking his backward movement. Brittany cock touched Tim's penis, and a shiver went through both of their bodies. She lined up his miniscule cock to her cock slit opening and thrust forward, sinking him into her. Pounding over and over, with dozens of thrusts, she sensed the cum rise in cock, and with a groan he shot his load down her shaft. His fluids mixed deep in her testes with the virulent cum pooling there. It's DNA modified, the futa male cum cocktail prepared for a return trip to Tim.

Brittany pushed forward and held, Tim buried to his pubic bone inside her, pinned hard against the kitchen island. The sentient lips of her cock slit massaged the length of Tim's small penis.

Brittany could feel an orgasm rising deep in her balls, as her musculature pulled them tight to her body. But this was a different sensation than with Derek.... her mind fleeting back to the body transforming in the bathtub.