She laughs as it seems history repeats for her

Your Aunt quickly puts two and two together about Tiffany's actions, her eyes meet Tiffany's and gestures to Summer and then back to your deflated cock, Tiffany nodding once more to confirm what Gracie was starting to worry about. She took a deep breath before rolling onto her side and thinking about how she was going to begin to even explain this to her sister. That she had not only watched as you very likely knocked up your own twin sister, but then joined in on the fun, probably impregnating you whilst also giving you a second chance at making sure Summer was knocked up.

It felt like there was no sense in keeping the truth of her real relationship to you and Summer hidden any longer, better to confess get it in the open as you wanted to from day one. Perhaps this could be the turning point, to help Gracie finally win over her sister again. She was going to be furious that was for sure, but she did always want grandkids and a bigger family. Thankfully Gracie knew she could use her contacts at the Futa Insitute to provide support and discretion with the medical side of any consequences. Although if today didn't somehow stick, Gracie was confident you and Summer would be experimenting enough to ensure something would.

"Well that was a hell of a start to the holidays," Gracie says warmly, slowly disentangling herself with from you, Summer and Tiffany.

"I'd say," Summer agrees slowly crawling upright, a thick trickle of your warm sticky cum leaking from her pussy. "Damn Alice, you really filled me up," Summer adds with a giggle.

"You think I'm bad, you should try taking one of Aunt Gracie's heavy loads," You reply with a satisfied sigh.

"Think I might have to, but maybe after we hit up a pharmacy," Summer replies with a smile.

"Thank god for plan B," You agree with a smile sitting upright.

"Little late for that Alice," Auntie Gracie replies with a smile "Tiffany already told me the good news," Gracie says with a grin.

"She already has a bun in the oven, little Mynx lied to me," Summer laughs shaking her head.

"Sorry Sis, we had this planned for a few weeks now," You reply with a laugh before turning to face your Aunt. "Still it's not too late for me and you," You add standing up and stretching. "Come up Summer lets both go, we've got a lot to talk about I'm guessing," You say with a wry smile.

"More than just talk I'm hoping, " Summer replies. "Maybe offer some entertainment on the drive over," Summer adds licking her lips.

"We've unleashed a monster," You say to Tiffany before you all start laughing, although your Aunt stops first and then starts to look a little sheepish

"So, I'm guessing by your plan to visit a pharmacy that you're Mom hasn't given you the full rundown on Futa Birth Control," Gracie says with a nervous look on her face.

"No, she left that to sex ed," Summer explains.

"I was afraid of that," Gracie says with a sigh. "You might want to sit down girls," Gracie explains with soft smile.

You sit down and listen, slightly numb as the realisation hits you when your Aunt explains how due to the differences between Futa Physiology that there wasn't any conventional emergency contraception that worked. Some of the finer details go over your head in your current state, but it did explain why your Mother always preached condoms as the goto method. Initially, you assume it was convenience, given you would be covered for either encounter, but the reality was it was both easier for you to get pregnant or impregnate others using the normal hormonal methods.

"So what happens now?" You ask soberly looking over apologetically to your twin sister.

"There's a chance we might not be pregnant, couples try for months and years and it doesn't happen," Summer offers optimistically.

"Sorry to disappoint you," Gracie begins before smiling waiting for the penny to drop. "Futa's seem exceptionally well suited to impregnating other Futa's," Grace adds with a nervous smile. "Hell, it only took once little mishap with my swimmers to create you both," Gracie admits

"Wait then that means..." You begin to say unable to finish the sentence.

"That I'm yours and Summer's Daddy," Gracie says with a nervous laugh.

"Wow," Summer says pausing to reflect. "Who knew Mom was such a kinky girl," Summer adds with a laugh.

You feel exhausted the news of Aunt actually being your father, the fact that much like Tiffany that Summer would probably be carrying your child, That you had been probably bred by your own Father/Aunt. It all feels surreal and you can't help but find yourself laughing along with your sister.

A few days into the holiday, your Aunt receives the tests which confirm that both you and Summer are pregnant, furthermore, she has Tiffany take a test which confirms that the baby would also be a Futa. This was rare but not uncommon in the studies your Aunt Gracie had worked with, she asked Summer to give her a list of names and descriptions of the various girls she might have given knocked up at college for a research team to try and contact for testing.

With the results in hand, Aunt Gracie, (who was still your Aunt despite being yours and Summers Father, since it felt weird calling her Dad after all this time), confronted your Mother with the big news. Understandably your Mother was furious will you all, but eventually cooled down and had a long discussion with her sister, although judging by the noise it sounds as though Gracie finally got her wish of truly reconnecting with your Mom.

It was pretty liberating not having to keep any secrets from your Mother, especially since you could share a bedroom and catch up on the quality time you had both missed. Tiffany also getting in on the fun, getting to be the juicy middle in a futa sandwich with a combination of you and Summer, You and your Aunt, Summer and Your Aunt and finally when she felt confident enough, Your Mother and every possible combination.

Thankfully the Futa Institute were more than happy to fund your rapidly expanding family, more than happy to have more Futa's to study as well as having more in the world. Thankfully whatever mutation that had initially led to Futa's evolving, had also solved a lot of the genetic issues from multi-generations of inbreeding, at least for now. The foundation keeping close tabs on the matter, which was just as well as being bred by and breeding your own Futa parents would become something of a family tradition as time went on.