Yours (alternate)

"Ooooooh! Naughty boy!" Carrie purrs. "So, you want me to help you corrupt corrupt little Angie?"

Your girlfriend already met your younger sister, Angella.

You've always loved this sweet little thing, she's a ray of light full of joy and energy, always up for a good laugh, always gentle and caring to everybody, and who grew up into this wonderful balance between cuteness and sexyness. She's now 20 and currently studying medicine at the university.

However, you have to wave your head no.

"Hrm... Not exactly."

Carrie frowns. "What do you mean?"

Now it's a little embarrassing. "Well, it looks like I completely forgot to mention I also have an older sister. Her name is Joannah."

Your girlfriend's eyes widen. "What? How could you forget to tell me about a big sister? And one sexy enough that you would fuck her rather than Angie's sweet ass? What does she looks like, by the way?"

"Ho, well..." you blush slightly and grab your pants to get your phone out of one pocket, then search through your pictures and finally show one to Carrie.

She stays speechless for a while, then burst out "No fucking way! This hot bitch is your sister?!"

"Uh... I guess?" You're not comfortable calling Joannah a bitch. Not that she doesn't deserve the name, but you have an almost supersticious fear of how she would react if she heard you. To say she's not as caring as Angie would be an understatement.

"Her tits are fake, right? No way those monsters are natural!" Carrie asks, fascinated. Her eyes are stuck to your sister's nipples pointing through the fabric of her top.

"Entirely the work of Mother Nature. I know, I was there everyday when they were still growing. There's been work on her lips, though."

Carrie stay silent for a moment. You're afraid she may have been intimidated by Johannah's look, but she turns to you with a devious smile. "Let me guess, that's when you started thinking about fucking her?"

"Y... Yes..." you stutter, caught by surprise. "I mean... Everybody was. My male friends were always talking about her and her boobs and asking me to invite them home or sell them pictures. Dirty pics sometimes. But I think I didn't need that to have this fantasy."

"I understand, I mean, fuck, did you see her? No wonder you have such high standards." she says with fake vanity. "So, what does she do in life? Please, tell me it's something involving lots of sex, it will really help me get off." she asks with pleading eyes, joining her hands in supplication.

You hesitates.