>>536145512
>Snoot
Anon/Fang
Naomi/Naser
Naomi/Kanye
Stella/Chadshark
Reed/Rosa (it's at least mentioned they date)
Spears/primalFang (if you count content from outside the game)

>Wani
Inco/Olivia
Damien/Liz
Randy/Sophia
Kiara/Buster
Ben/Lunara
Taxi Driver/His Wife

And these are different-species couples that are explicitly in-game (barring Spears/pFang)
If there's this many compared to the two explicit same-species ones, there's a good chance that mixed relationships aren't as uncommon as people would think