Keep watching.

Opening the door a little further, you continuing watching the scene before you: Heather licking Trish's pussy. Your hand gently strokes your rigid member, as Heather crawls up on the bed. She shifts around with her head pointing south, and kneels over Trish's head. Trish juts her mouth up to lick Heather's slit from top to bottom. Heather moans.

"Oh, yeah. Lick it, Honey," Heather commands.

"You taste mighty fine, Heath," Trish says.

Heather resumes her attention to Trish's lower lips and clit. More groans are emitted from the vicinity of Heather's privates. These two lovely teenagers present a perfect picture of the '69' position: beautiful curves, breasts delightfully squeezed into each other, mouths working diligently. You can hardly believe your luck. You continue wanking your cock. Heather moves one arm and inserts two fingers into Trish's wet cunny.

"Jesus, yes! Fuck my pussy with your fingers!" shouts Trish.

You see Trish return the favor, and Heather screams wordlessly at the penetration. Soon, both of their hands are moving feverishly in the other's cooch, and they are panting like dogs in a heat wave.

Heather purrs, "That feels so fine. Mmmmmmm."

Heather's hips are spasmodically pressing into Trish's face, and Heather gasps as she begins to come, her nectar spilling into Trish's mouth. You can see the muscles of her butt clenching in time with her orgasm.

"I ... I ... I'm ... uh ... cum ... unh ... cumming! Fuck! Fuck! Fuck!" screams Heather.

She seems to take forever to stop, whimpers escaping her lungs. Trish licks and finger-fucks her through her climax. They finally relax, their breathing the only sound in the room,

Suddenly, you gasp as your cock erupts, semen spilling onto your hand and dripping on the floor. Both girls on the bed look up at you, surprise registering on their faces.