27 [M4F] Realistic brother/sister scenarios

I am 18+ and all characters and participants must be 18+

I absolutely love incest, particularly the brother-sister taboo. The attraction is there, the lust, but also the knowledge that what you’re doing is wrong and so fucked up. But even with that acknowledgement, there’s this indescribable magnetism that draws you together into each other’s illicit embrace…

For my RPs, I love a lot of buildup, not simply jumping into bed with each other or scenarios like “help me stepbro, I’m stuck” or “blonde bimbo sister addicted to her brother’s hypercock”. The cliches, after a while, get kind of off putting. For me, the realism is what adds to the attraction.

So what would it take for a brother and a sister to realise their innate urges for one another? Something that makes them feel so guilty and wrong but even after talking it out, or outright dismissing it, they can’t help but entering into the world’s oldest taboo?

Hooking up while drunk: The standard practice, what’s wrong with having a few drinks with your brother/sister? What’s wrong if a little lewd conversation slips in? Or even a fun strip game? Or a little kissing? Turns out, all it takes is a few drinks to let a filthy taboo become more and more likely

Accidentally matching on an app: Look it happens to us all right? You’re swiping late at night and you accidentally swipe on someone you shouldn’t. Of course it’s awkward if you guys match but you can laugh it off right? Or you can take the conversation to places it shouldn’t go and see what happens…

Hooking up at our sister’s wedding: A fun new one I thought we could try. It’s our sister’s big day and both of us have turned up without plus ones. Our sister is getting all the attention while you and me just sort of get stuck making conversation as time goes by. Maybe we’re a little bored, a little drunk, or we just don’t like our sister that much, but eventually we decide that hooking up might just liven up this wedding.

ok, so I need you to do this thing for me…: one of us has a work event that we need a plus one for. The reason why can be discussed in the scenario. It’s last minute so reluctantly, we decide to pretend to be a couple for the evening, even having some fun about how we met and the stuff we got up to. As the evening goes on however, we start to think about how we can keep this going…

Is it really so bad if we…: We’ve always been quite close, maybe closer than a brother and sister should be. One night we’re just talking and watching a series together when an incest scene comes up. Instead of getting grossed out, we talk about it, and discover there’s always been a little mutual attraction. So would it really be so bad if we…

Accidentally getting married: We're oh holiday together and as brother and sister, we naturally don't see eye to eye on a lot of things. However, there's a night where we get absolutely ducked up and wake up to find out that we're married. Of course we feel guilty; but we can't end the marriage without exposing that we've engaged in brother-sister relations. So we pretend to be married for a couple of weeks; only to genuinely fall in love...

Going to the museum of prostitution in Amsterdam: We've gone on vacation together and, with most places being tourist traps or too expensive, we've started wondering around until we stumble on the museum of prostitution. We go in and with it being just us, you let slip it's something you've fantasised about before, leading for an interesting conversation to go into a taboo arrangement...

Bumping into each other at a kink night: I’ve done this a couple of times at a kink night with friends and I always wondered what it would be like with a sister. You know the type, music thumping, leather, latex and masks everywhere. What starts as an awkward encounter gradually turns to something wicked and taboo