But that doesn't really matter, they aren't actually related. (I actually have a cousin/aunt and uncle/cousin because of in-law dating, lol. I just call them aunt and uncle, even though they are also my cousins)
At least in this case they are the same generation.
im on chapter 60, if shinnuy and lindt like each other...... arent they in-laws? since their sblings are lara and eskal?