As long as it’s fully consensual and you use contraception, I don’t see a problem with a brother and sister having s.ex.
Really crappie at work today. Gotta unwind by wearing female things, perfume, forgetting the Monday work day. Maybe even blast a load, so relaxing.
I found out the hard way that there are no equal opportunities. I did things only the right could do and get away with. I’m not rich and I’m paying the price for those things every day.