Mouth.

Carla pulls all but the tip out of her mouth, her tongue wildly massaging the underside of your cock. Her fingers fondle the space between your balls, flooding your whole groin with electricity. Something good must be going on at Carla's cunt, as she moans and hums into your tool.

"I'm going to come!" you yell. Carla sucks even harder on your cock as the pulses of your jism hit in her mouth. Her tongue whips more and more cum out of you, and a small dribble slips out and travels slowly down her chin. Your eyes close as your climax takes over your body; a primal growl thunders from your lungs. Carla keeps up the pressure, and soon you slump, resting your hands on her shoulders, your waning erection pulling your dick from Carla's mouth. You open your eyes to look at her, only to see her visibly swallow your spunk. Just then she shouts as her body convulses in a powerful orgasm. A drip of cum drops from her mouth onto your thigh.

As both of your orgasms subside, Kat stands up and turns Carla over next to you. She then leans down and kisses Carla hard on the lips. Carla opens her mouth and slips her tongue into Kat's eager mouth. Kat can taste your salty cum on Carla's tongue as it tangoes with hers. You look on in wonder as the two women play tonsil hockey.