Hannah may well have a bit of a disability fetish, and/or a tendency to want to care for people and things. That part seems likely to me because she sought him out after seeing him in a video.
As for your earlier post on the subject, you were just showing your ignorance. At the time I replied, but decided I couldn't be bothered with it and edited it out.
If you read up on his condition and you'd know SMA doesn't affect the functionality of his penis, (they addressed this in a video) - watch a few more videos and you might get a feel for the fact that they are a genuine couple who care about each other.
Not to mention the fact that they are now married. Of course, people claimed that was faked too. But the Minnesota marriage records say otherwise.
There are plenty of rumour debunking videos, suggest you watch one or two. Shane isn't rich or famous either. As he said, unless you're Stephen King, first time authors do not make bank.