Oh, no you don’t.
If you think you’ll have a genetic mess with your sister, you have NO IDEA what will come of mating with your opposite-sex clone.
The best case scenario, and I’m talking if you’re EXTREMELY lucky, is it will be a democrat.
You’ve caused enough trouble here. Back to work.
The Good Doctor's song made no reference to producing offspring. He was concentrating, rather intently I might add, on the possibility of finding a sex partner with his own level of dedication to the art.
Also, I feel it only fair to mention that as a science fiction writer, as well as a Foxworthy Redneck of multiple dimensions, -- (not whether, but in how many ways I might be such) -- sisters, (and female cousins) in my genetic neighborhood have always been regarded with a very special filial affection.