What do you think of people and animals having sexual relationships in this series?

ummm you couldn't exactly call an animal a animal in a fable. In a fable animals are humanized so you could say it's nothing different from interracial sex. (in a fable) As it would be for a mexican to make out with an asian in our world.

It's not really any worse than say human/elf, or human/Vulcan relationships in other franchises. It's weird, but as long as they're both sentient and humanlike, it's not an issue. Though I don't really agree with the mexiacan/asian analogy, since they're both of same species.

Nobody complained when Mar-vel was hooking up with human women and I'm fairly certain the Kree consider humans animals

" Nobody complained when Mar-vel was hooking up with human women "