There was quite a bit of controversy when General Hospital made a real couple out of Luke and Laura, since their “relationship” started with Luke purportedly raping Laura.
Took quite a bit of work for them to retcon that one.
Still, I’m trying to imagine the stupidity of someone (even a book character) who would argue that raping and murdering someone is helpful to prevent inbreeding.
The murder part kind of makes the whole “breeding” part moot.
Yeah...that “murder” part DOES put a damper on the continuation of that particular bloodline.