>gf finds out I've got an incest fetish
>admits that she used to fool around with her own brother when they were teens
>she's shy on giving details and downplays the hell out of it
>and insists they stopped years before she met me, after a "major pregnancy scare"
>which I suspect means her brother actually knocked her up
>I tell her I'm cool with her fucking her brother again as long as she keeps me in the loop
>she gets flustered and firmly insists there's zero chance
>says she doesn't think he'd be interested, they have a normal relationship now, etc, etc
>a few months later, she goes home to visit her family for the holidays without me
>a couple days into the trip, I get a sheepish text from her asking if I was still okay with her messing with her brother
>I say "lemme guess, the two of you just fucked, didn't you?"
>she's like "yeah sorry... I told him what you said and he got really excited..."
>I tell her I'm still cool with it
>she asks if I want her brother to wear a rubber
>I say I don't care as long as he doesn't knock her up again
>she avoids either confirming or denying that little teasing dig
>end up getting texts from her literally every day of the rest of her trip admitting to more stuff happening between her and her brother