If Dixie Kong is Chunky Kong's cousin, and Diddy Kong is Donkey Kong's nephew...

If Dixie Kong is Chunky Kong's cousin, and Diddy Kong is Donkey Kong's nephew, and Chunky Kong and Donkey Kong are brothers, then are Diddy and Dixie related? And why are they described as boyfriend/girlfriend?

What, you think monkeys never inbreed?

purest form of love

The Kong family line includes several different species of great ape and lower monkey. It is best to not even question it. However, since you brought up primatology, it is clear that god's greatest natural creation is the gibbon.

First pic isn't that bad, I'd love to pump his shaft and shotgun all his cum

Diddy was described as DK's "Adopted Nephew" by smash trophies. Dixie also has no tail, indicating she is an ape like the other Kongs.

...

Sorry, I'm not into black girls.

Imagine being such a cuck that you become Jr. to your own son.

wow nice retcon, nintendo