They aren't actually blood related and they didn't know eachother growing up so there are no familial relationships or grooming. Male lead's stepsister had a secret child and only brings him back after he's an adult.
So it's only considered incest if you care about like...marriage certificates? Idk the whole family doesn't care for each other at all anyway, so they might as well be just two individuals that met.
They aren't actually blood related and they didn't know eachother growing up so there are no familial relationships or grooming. Male lead's stepsister had a secret child and only brings him back after he's an adult.
So it's only considered incest if you care about like...marriage certificates? Idk the whole family doesn't care for each other at all anyway, so they might as well be just two individuals that met.