F*** her first!
From Create Your Own Story
Melinda smiles, and slips off her lingerie panties, revealing an upside-down-narrow-trapezoid shape of neat bush. She lays down, and welcomes your dick in with a leg spreading. You slide in the head, slowly as she sharply inhales in pleasure. "More" she whispers, biting her lower lip. So sexy, you think. You push in the rest of your shaft, filling Melinda's pussy. Slowly you start, but get faster by the minute. That's when the strange starts happening. You feel a fizzy sensation in your cock and balls, unlike anything you've ever experienced. Then your balls start expanding, very slowly, but definitely. Melinda starts fingering her clit, and leans her head back, eyes closed. Your balls are expanding rapidly now, and the fizzing increases. Strangely it all feels too good. By the time Melinda looks back to you, your balls have stopped expanding, the size of tennis balls now! She looks bewildered, and reasonably so. You can feel the cum now, the fizzing has turned to burning! You are about to burst!