Remember Chelsea (Georgia) was raised by another family until she was a teenager so she didn’t know Max at all. I know there was a lot of griping about that relationship but I didn’t find anything wrong with it at all. As long as there is no blood ties, what’s the problem? I mean, even if they had been raised as brother and sister, I’d be okay with it.
The only reason familial relationships are frown upon is because of the possibility of retardation of the kids…IF there are any. And even that can work both ways, a child of an incestuous relationship can also end up a genius. It just depends which dominant genes they inherit, good ones or bad ones.