Yes, you were horny and curious

After watching two hot women go at it for so long you were **** to get off yourself. Looking at Allison's used and abused pussy you were curious what it would feel like now.

You crawl between her legs. "Ohh....Jesse...don't..." She sighs.

You ram your rock hard manhood into her now slack loose hole. It felt completely different. Her tight gripping snatch replaced by a slick gaping hole. She still felt good around your dick, but not nearly like it was before. You pull off her mask as you begin giving it to her hard and fast. An awful slurking sound fills the room as you plunge your ill fitting meat stick into loosened tunnel.

She goes with you gamely for a time but eventually looks at you with disappointed eyes. "Oh Jesse baby. It's no use, I can barely feel you. Just go ahead get yours okay?" She lays there patiently as she waits for you to finish.

You didn't need an invitation. After being excited watching them for an extended period you weren't going to last long anyways. Soon you are groaning as you bust your nut into her ruined cunt.

You pull out and peel off the condom, dropping it into the same bin as Fiona's you notice how much smaller it was.

Allison lets out a huge satisfied sigh. She couldn't wait to start conversing with you. "Oh my god Jesse. That was amazing! Thank you! I never realized what a slut I was for huge cocks, that was a real eye opener. Fuck that felt good. We have to do that again...and soon!" She leans up. "Okay...now, who is he? You have to tell me."

You realize you don't have the keys to the bonds. "Um...I'll be back...with the keys."

You throw on some shorts and head for the door. Fiona was waiting just beyond. She was dressed and had on her usual long loose flowing dress. "That didn't take long." She whispers as she walks into the room with the key.

Allison greets her. "Oh Fiona! You're brother and his friend are freaks. Amazing wonderful horndogs."

Fiona nods as she begins unfastening Allison. Allison just lays there as she is uncuffed, still relaxed in the afterglow. "God...it was amazing." She looks up at Fiona. "Do you know his friend? Do you...know...about his friend? Who is he? Someone tell me!"

Fiona gives her a friendly but distant smile. "Oh yes, I know his friend. He already left. Sorry, I'm sworn to secrecy. Isn't that right Jesse?"

"Uh...yeah." You respond. You start to get dressed.

Fiona asks. "You liked his friend did you? Don't you think he's, you know, too big?"

Allison shakes her head as she starts getting up. "Yeah, too big. But god...it just...it was incredible. I mean, he took me places and made me feel things Jesse never could. I'm sorry Jesse, but it's just true. It was...wow!"

Fiona presses, asking with mock innocence. "But...doesn't Jesse feel small after his friend? I'd be worried about ruining myself."

Allison lets out a sigh. "If this is ruined consider me ruined. Ohhhhh...wow. It's true, I could barely feel Jesse after his big friend."

"Really?" Says Fiona. "You could barely feel Jesse? You must really be puny little brother."

"Jesse's okay size, but after his friend!? Yeah...he felt like, I dunno, just a finger or something. Worth it though, totally worth it." Your cheeks burn with a humiliated blush.

Fiona chuckles as she looks at you. "I think you've just been cucked little brother."

Allison giggles as well as she gathers her things and begins dressing. "Yeah, I guess he has. But I think that's what he wanted, wasn't it Jesse? I mean you don't let your girl get split wide by a beast like that unless you want to be cuckolded. I mean you couldn't hope to compare." She sighs. "Don't worry Jesse, I loved it all and I still like you. A lot. More than ever!" She kisses you on the cheek. "God damn, you've really opened my eyes. I'll never be the same." She kisses you again. "We have to do that again, please baby. Just let me know okay? Anytime!"

As she begins to get dressed she says. "Sorry, I've got a late shift tonight. I better get going."

Before she leaves she takes Fiona aside one more time to try to discover the secret to the mysterious friends identity. Fiona of course refuses. As you watch Allison leave you know it wouldn't last long with her now, you're sister had well and truly wrecked that pussy for you forever more.