You gained three new siblings that night and one of them is Tanya

Of course, you had no way of knowing that Jamie and your mother would end up having twins together, what you do find out as you open up the brown envelope and start reading the results, is that Tanya is, in fact, a half-sister of yours. You can barely contain your excitement and happiness, but you manage to keep yourself composed as you look up into Tanya's blue eyes.

"So it looks like I'm carrying our fathers baby sis." You say as a giant grin takes hold of your face, as you watch Tanya start jumping up and down in joy, you feel slightly sad that the man who raised her as his own was not actually her dad, as he was a nice man, if not a bit distant, due to his busy work schedule.

"Well my precious pregnant princess is also my scrumptiously sexy sister, today is looking to be a really good day." Tanya giggles as she gives you a tight and loving embrace.

"Yeah, I can't wait to watch that film of my mom and our brother, it's going to be so much hotter than my video." You say as you start to kiss Tanya down the neckline, also this has given me a great idea for your own impregnation video." You continue as Tanya moans from your kisses as you peel her out of her black and red catsuit, and kiss her down her pale skin, and caress her big boobs with your soft hands.

"I'm thinking some sort of game-show type set up, where we'll film you losing a few rounds, and getting dosed up with fertility ****." You coo as you continue to kiss down her body, you plant some kisses past her navel and stop just above her almost completely shaven pubic region.

"Then we have our dad and brother come in as you keep loosing more rounds, we'll tie you down, and tell you if you can guess who's fucking you that we'll tell them to pull out, but the trick is we have both our dad, and our brother come in and fuck you swapping them out so you can't tell it's a different person. It ends with them both dumping a load deep in your fertile snatch, and then we don't know who's baby it is maybe you could even end up with twins but with one of them being dads, and the other being Jamie's how hot would that be." You giggle as you kiss down Tanya's pubic area and start to gently lap at her soaking folds.

"Oh my god, that would be so intense, let's do it! Speaking of doing it, I feel like we should be eating each other out, rather than just you eating me, let's take this to the sofa, so we can get to know our new sister better." Tanya coo's as she just manages to stop you lapping at her pussy, as taking your hand to lead you over to the sofa.

You spend the rest of that amazing night, smothered between Tanya's legs, while you listen in to your mother being bred by Jamie. You cheer them on as you both continue to eat each other out. The night flies by in a haze of sexual incestuous bliss, until you both fall asleep lying on top of each other in the 69 positions, you dream of very sexy thoughts, and will have a hell of a view when you wake up to Tanya's ass in your face.