Of course

The naked pic takes 4 weeks to get. Faster than you expected (not faster than Carrie expected) but Cassidy, it turns out, is as into you as her sister.

“You’ve got to send her one back” Carrie insists. “She’s gotta see your gorgeous cock”. It would be an odd thing for your girlfriend to say about another girl let alone her own sister. “And then I want to watch as you jerk off to it.”

It’s amazing how quickly it takes for things like that not to take you by surprise anymore. Yup your girlfriend wants to watch you jerk off to a picture of her sister.

“When?” You ask

“Why not right now?” She asks, grabbing the growing bulge in your crotch.

So you pull up the picture wondering if it’ll be weird for Carrie to see her sister buck naked.

If it is, she doesn’t let on “nice” she says looking at Cassidy’s naked body, her little nipples, her shaved twat. “Did she take this picture for you or is this a picture she has ready to go whenever needed?”

“Do girls do that?” You ask. Carrie smirks and nods. “Well I’m not sure.” You say.

“I think you need to make some demands” Carrie says. “Maybe a picture of her spread. Or a picture of her covered in cum.”

“You want me to tell her to have a guy cum in her and take a picture for me? You do realize that this is your sister we’re talking about right?” You ask teasingly your cock hard as Carrie pushes her hand down the top of your pants.

“Of course. You do realize that when I say ‘covered in cum’ I don’t mean just one guy, right?” Her hand squeezes your junk.

“You think she’ll do that for me?”

“If she does, it probably means she’ll do anything for you right?”

“Just like her sister? A couple pervert sisters.” You return Carrie’s grope with a grope of your own, reaching over and squeezing her right breast.

“Hey, don’t call me a pervert” Carrie jokes. “Now forget jerking off. I want you to put the picture up there so you can see it while you fuck me. And call me ‘Cassidy’”

Which you do. Three times that night. Your cock buried deep in Carrie as she asks you questions about her sister like “what are you most excited to see in person? Her tits or her cunt?”

The next day you send the real Cassidy that naked pic Carrie suggested.

‘Holy shit’ Cassidy texts back.

And on queue you request another picture of her. Something where you can “see deep inside you” as you put it.

If there any doubt just how eager Cassidy is, that picture comes in 5 minutes.

So you tell her how sexy she is and ask for a picture of her “covered in cum”

“Wut does covered mean??” She texts

“Maybe... 5 loads” you can’t believe you’re having this conversation.

“U think I’m the type of grl who can make that happen?”

“If ur anything like ur sister”

“WHAT? No she hasn’t”

You turn to your girlfriend who conveniently happens to be sitting next to you as you text this “she wants to know if you’ve ever been covered in cum?”

“What did you say that meant?” Carrie asks

“I said...”

“I’m just kidding. The answer is yes. Whatever you said, I’m sure I’ve had more.” Carrie seems proud.

“How can you be so sure?” You ask

“Did you say 23 loads?” Carrie asks

You just shake your head and get back to texting.

But Carrie interjects “tell her if she can’t pull it off, you’ll help her when she visits this weekend.”

What? Did you hear that right?

“This weekend?”

“Yeah” Carrie answers calmly “you knew the plan”

“I just thought you’d be keeping me informed.” You say

Carrie smirks “A good girlfriend should be full of cum and surprises.”

And suddenly this whole thing enters a new level of reality.

“Speaking of surprises.” Carrie has more up her sleeve. “There’s a catch... with Cassidy’s visit this weekend”

“There is?”