petermc Sure, and I think most people realise that it's generally not advisable to sleep with your relatives, and I don't think most people (me included) want to, though some are into the fantasy aspect of it. The whole appeal of 'taboo' porn in general (to me, at least) is the idea of giving in to temptation and crossing a line you know you shouldn't; but most people don't want to actually cross that line. But I'm more-or-less a libertarian, so I don't think you can criminalise those who do want to, provided it's consensual. Your point about that being hard to establish is well made.
The Dellai sisters and other twin pairs obviously realised that there was money to be made in crossing the boundary and are OK with doing it. At least, you hope they are - I mean, they're doing full live shows in Berlin to a huge audience. You mention reputable porn studios, but CzechVR did two videos with the Dellai twins where they do interact with each other, one being a girl-on-girl scene with just the two of them. They were forced to take these down fairly quickly after releasing them, but they produced them.
Anyway, yeah - I'm a perv, but I agree that family porn should be actually-unrelated people getting paid to pretend to be related, and I would like the pretending on SLR to be better than it often is.
