Alabama

no??? im pretty sure they're not cousins

But isn't their grandmas sisters?

they are?? where im spiraling

i thought they just looked similar

Idk what spoiler, but no (from what I know).

And not that I accept incest or anything, but during that timeline it was normal to marry your second cousin or so.

(**The ML isn't the bio son of the Duke.)

yeah basically..
luca’s great grandma on his maternal side and his great grandpa on his paternal side are siblings