Put your hands on her hips and grind.
From Create Your Own Story
Following suit, you stop paying attention to the game and grab her swaying hips, pulling her further against your crotch. Watching her dance has you sporting your full nine inches inside your boxer-briefs, and you hear a little gasp. Like everyone who has recieved the pleasure of seeing or feeling your dick, she's surprised at the sheer thickness and length to it; underneath you've even got a hefty sack to add further weight to your package. It's possible to hide when your head is clear of libido, but with Kara rubbing herself on you it's become a prominent tent.
Adam will be returning soon with drinks. You decide to...