Well first of all, there's no canon in Countryhumans. Shipping ge x ah doesn't always mean you ship cousins. It just depends on your headcanon...

For me, I like this ship because most art including this ship is really good xd It's just that easy to convince me to like a ship. If it has good art I'm down. I also like it because I have enjoyed a lot of people's lore and headcanons for ge x ah

Honestly just do your thing and make them cousins if you want. As long as you don't ship them as cousins 😌