He fucks your wife.

Heather gasps in shock as all twelve inches get smoothly inserted into her.
"By the time, I'm done, you'll need all five fingers to Jill off!" Simon boasts as he drills her deep.
You envy both of them; Simon for being so well-endowed that he can plow your slutty, busty, sizequeen wife whenever he wants, and Heather for getting that huge cock.
The springs of the bed scream as the big cocked Chinese bastard impales your wife's vagina, right down to his big balls slapping against her arse as he treats her to the wonders of a massive penis.

Simon keeps thrusting even as Heather rides that meat stick into her first orgasm. Her big fun bags flopping as the stud penetrates her, your wife gives you a side glance, letting you see just how consumed by torrid pleasure she is. Looking over your freshly feminised body and scrawny cockette, she cracks a smirk, wordlessly basking in your humiliation. Your inadequacy, your weakness...your extra tiny willy.

At this point, Simon picks up the pace, eager to release his powerful load into your wife's depths. Heather wraps his legs around his waist, pulling him in closer, working to make the orgasm mutual and simultaneous - hungry for that great big dick, the dick you've always been in the shadow of.
By the end, they're both screaming - driven wild by the intense sex. With a final moan, your hung Asian neighbour sprays a thick quart of cum, and Heather, overwhelmed by the sheer size of the cock jackhammering her, follows suit and gushes around it. Why couldn't have it been you?