dick from behind

"OK, bend over and grab that bench," you tell her after she strips.

Lily bends over and grabs the bench.

"Lily, I know you're the type to easily have multiple orgasm during sex. We are going to test to see when you have your first orgasm then how many you can have."

You slap her firm ass.

"Yeowch!" she says,

"I can see a spanking turns you on," you say. "You love having your ass slapped during foreplay AND sex, don't you?"

"Yes, doctor," she coos.

You smack her ass a few times, and she gets wet. You drop your pants and boxers and slide you stiffy into her wet pussy. You grab her hips and thrust away. It doesn't take long for her first orgasm.

"Record time!" you say as you pump away. You smack her ass a few more times, and Lily has a few more orgasms. You grip her hips and thrust in as deep as you can.

Lily starts shouting "Oh God! Oh yes! Oh God yes!" she says.