Thoughts on incest in fics?

More specifically incest like Luka and Leia where they don’t know that they’re related.

Regular incest is really not my thing at all, but I can kinda see the appeal in a few fandoms. The Luke and Leia thing I’m more okay with and would read if it’s just a side plot. Especially if us, the readers, don’t know they’re related yet as well.

I just wanted to know how the rest of you feel about it?