Distract yourself.

You excuse yourself and head back to the grill, finishing off the last of the burgers while Rebecca busies herself setting the table and arranging the salads. Every so often, you glance over at Gemma and Jeremy, but they don't appear to take any notice of you, simply mingling with the other guests. When the food is finally ready, you all take your seats around the long table. Gemma smiles at you as she takes her place directly opposite you. Of all the places she had to sit, it was there.

As everyone starts to eat and chat, you sit there motionless. Your appetite is non-existent. You take a swig of beer, but choke as you feel something press up against your groin. You look down to see Gemma's bare foot, her toes expertly peeling down your zipper and spreading open your pants with remarkable dexterity. She's not even looking at you, and you wince as she begins to stroke her foot up and down your rapidly hardening cock. It snaps out of your underwear, standing completely erect, and she begins to run the ball of her foot down the underside of your shaft.

You press yourself forward into the edge of the table so that your wife can't see what's going on. The sole of Gemma's foot is incredibly soft, and she rubs the sensitive tip of your cock with her delicate toes. You feel yourself leaking pre-cum all in between her toes, coating your shaft as she jerks you off with her foot. For all your anger and jealousy right now, Gemma has you in complete control as she works you over with a single dainty foot.

You grip the edge of the table and jolt it violently as your balls tighten, and you explode all over the bottom of the table. You apologize to those around you and grimace as Gemma presses her foot firmly against your cock and milks the last drop out of you. As you button yourself back up, you watch as Gemma silently slides her cum-covered foot back into her shoe.

The rest of the evening is uneventful, and you and Gemma don't share a single word after that point.