Put his mouth to use, on your ass

"Hey bitch," you bark at Tristan. "Get your mouth on my ass, now."

Tristan curls his face in disgust, but he moves immediately, crawling on all fours over to your ass. He spreads your cheeks and you feel his tongue slide through your crack, pushing against your puckered anus. You groan and push forward as pleasure ripples through your body, until you have completely bottomed out in Vanessa, your cock head resting against her cervix, the thick base of your shift stretching wide against her clit.

You rock your hips forward, and Vanessa gasps, shakes, and lets out a small scream, her body immediately having a small orgasm. Tristan lurches forward with you, his tongue continuing to work on your asshole as he grips his little prick with one hand.

You begin to circle your hips as you slide your cock slightly in and out, the head rubbing against her cervix as you stimulate her clit with your pelvic bone. Vanessa arches her back, her orgasm intensifying through your efforts. She screams louder and you feel her juices running down your balls and thighs as she reaches her highest peak.

As she recovers from the greatest orgasm of her young life, the submissive little girl seems to evaporate and she grabs you by the neck, pulling you down to her for a passionate kiss, your cock still pistoning her humid cunt, and Tristan still worshiping your filthy ass. As the kiss breaks, she looks at you with tears in her eyes.

"Thank you Dave," she cries tears of joy, "thank you! I think... I think... I love you."

You thought this might happen.