They'd still be cousins since Raven and Qrow are siblings- Raven being yang's mother.That theory has been debunked multiple times at this point thats just a FNDM accepted headcanon.its a shit theory and i kind of am sick of it?? but thats not the point herall in all, ship whatever the hell you want good/bad/problematic, its a fake show with fake people in the end. lolnothing matters~