Tracy of course

"Alright then girls, I think we have a clear winner of the oral competition. Well done Tracy, you really have a throat like no other."

Mia looks slightly disappointed, but she's also staring at her sister with wide eyes of admiration as she's still being throat fucked, too busy to celebrate her win. You can feel your first orgasm of the night coming on and as it finally hits you, you shove Tracy the whole way down on your cock, releasing your load deep into her throat. Mia can see her throat bulging from her angle as Tracy happily gulps down her reward. Satisfied to finally have sweet release after holding on all afternoon, you toss Tracy off your cock by her hair as she lets out a big sigh of relief at having won the competition and finally being able to breath properly.

"Thank you sir." She looks at you with a cum drunk smile.

Finished with the first round of the competition you move over to the couch and assume your position for the next round. Mia crawls over to wait by your knees but Tracy takes a moment to recover before finally crawling over and waiting alongside her sister. The two of them really look like filthy whores with Tracy's saliva covering both their faces and their **** collars wrapped around their necks.

"Alright, the next round is a titjob. I assume you both know what to do here. Tracy, you can start this one off."

Tracy smiles at the opportunity and shifts over to a kneeling position between your legs. She then grabs a breast with each hand and squeezes them up against your cock before rubbing them up and down repeatedly. Your cock slides between them easily thanks to the thick layer of her spit covering it. Tracy doesn't seem to have a lot of experience in this, but she's definitely doing well for an amateur. She stares you in the eyes whilst she rubs her firm breasts up and down your cock, which is slowly starting to harden again after your previous orgasm.

After a while of running her tits up and down your dick, you decide Tracy's had a long enough shot and it's time to swap over to Mia.

"Alright, time's up. Mia, get over here."

Tracy gives your cock a little kiss before shifting out of the way for Mia to take her place. Mia assumes her position and grabs her much larger breasts out of her mesh slutwear and puts one in each hand. She then wraps them around your cock and starts pumping up and down. With her enhanced fake-boobs, she's able to cover your entire cock as she slides her tits up and down. After a while of warming up she then looks down, putting her chin to her chest so her mouth is pointed down at your cock. Then, every time she sinks her breasts down to the base of your cock, she uses her tongue to play with the tip, adding to the immense pleasure of the titjob.

"Do you like the way my big tits feel all over your cock daddy. Can you feel how much bigger they are. I got them bigger so I'd be a hotter, more fuckable, whore."

Her dirty talk is working wonders and you tilt your head back as she continues sensually verbalising all these lewd thoughts.

"Alright, you win whore. Good job, that's enough of that for now."

"Thank you daddy."

She shoots Tracy a threatening look before lifting her hefty tits off your cock and assuming her position on her knees alongside Tracy. With that round done it's time to move on to the next one.