Thread:PrinceBalto/@comment-27210425-20171213035022/@comment-27210425-20171222203006

Yes, he was well aware Zira being his aunt, and of him and Nuka being cousins. In my take on SP, this is why, just before Nuka's death, Simba turns for a moment and says "Goodbye, cousin," in a sad tone. He and Nuka were also good friends when they were cubs, and Nuka didn't quite understand why Scar wanted to kill him and Mufasa so much.