[f4A] siblings find loopholes

They're brother and sister. They're twins. They're 22. They share an apartment. And they're absolutely insanely horny for one another. They are dying to fuck each other.

But they can't! It's illegal, it's forbidden, it's… we just don't do that! Every element of society is telling them in a thousand different ways that brothers and sisters DO NOT DO THAT. So, they don't. And they don't do all the other things you're never supposed to do with siblings. Rules are rules, right? We live in a society of laws and there's no use fighting that.

But there's no rule against, say, giving your brother a hug, right? Or sometimes siblings might hold hands. That's okay! It's sweet, it's nice, it's permitted. What about kissing? Well, it depends on the kiss. Brothers don't kiss their sisters on the lips, you know. But on the cheek is fine.

That's why this brother and sister—who, again, are absolutely on fire with the need to fuck each other—hug and kiss so much. Of course, the hug starts looking more like him wrapping his whole body around hers, and her kiss on his cheek involves a lot of tongue, but the point is they're playing by the rules!

Most of us just internalize these rules and never really think about them. Nudity around a sibling of the opposite sex is very frowned upon, right? But underwear, well, that's not such a big deal. That's why our siblings never go naked around each other, but they do spend a lot of time in their underwear. The fact that her panties are crotchless and his cock is out of the fly most of the time doesn't change the fact that they are, indeed, acceptably clothed by the underwear standard.

So that's what I want to talk through (please note: not a roleplay, just exploring the idea). Let's figure out what rules these siblings feel bound by, and what loopholes they figure out to give themselves maximum enjoyment. This is obviously a little silly, but they take these rules very seriously! They never break them! Let's figure out what that means for them.