Weirdly there is actually some lore suggesting that Khajiit might be able to interbreed with the various "normie" races, though how exactly this would work is unclear, though to be fair its also pretty unclear exactly how the different breeds of Khajiit can mate with each other. In "The Real Barenziah" - it is explicitly stated that "You ought to meet some nice Elven boys, though. If you go on keeping company with Khajiits and humans and what have you, you'll find yourself pregnant in next to no time." and although the book comes from Daggerfall originally, when the Khajiit were more humanoid, notably the revised edition never removed this passage. Granted, the word of one character who might be wrong, assuming that they even existed outside of a possibly fictionalised biography, can hardly be treated as hard evidence, but the way that its so flippantly mentioned suggests that the idea isn't seen as completely absurd at any rate. There are some other shreds here and there that lend some credence to the idea too, though they are mostly along the "maybe its possible" line of thinking rather than just saying it is, but I can understand that there are more important things than figuring out how to handle edge case relationships that may or may not even be possible without creating total abominations.