Which type of aunt-nephew sex is creepier?
When you have sex with a person your own age (actually about a year younger) whom you did not know was your aunt, because you didn't meet until you were both adults, and neither one of you has ever met the father/brother who defines your biological relationship....
...Or when you have sex with the significantly older woman who was married to your uncle?
I wonder if that's why Tommen finally jumped out of the window? This show is absolutely un-rewatchable.
Regarding Jon and Daenaerys - they aren't aware of their familial relationship so I am not bothered by it. Plus this was a normal thing for the Targaryens to do as well so I specifically don't judge that kind of relationship. Same as when I read about the ancient Egyptians during the Ptolemaic Dynasty period - it is what it is. I am not bothered by it.
Try to watch the show without projecting your own conception of morality onto it.