Precisely... I’m seeing a lot of extrapolation. I’m not entirely sure that Izack is specified as being incestious either. The word they use is ‘unwholesome’ which can apply to a lot of unhealthy relationships. Not least of which is locking a person away in a room as stated by the book.
Now you can play it that way. Though I had Izek by the brother of a female PC with an unknown origin similar to
@Charlaquin simply because it was more engaging than yet another person be after Ireena.
A lot of the issues are springing from the fertile minds of readers. Not that this is a problem, or rather it’s a PICNIC... Problem-In-Chair-Not-In-CurseofStrahd.