Quick question for you all...

I've been an RP-er for quite some time now, and I came across something interesting; I'm sure this has been covered before, but I seem to have forgotten. I was reading in a review in the paper (archaic, I know) about that new movie about the life of Stephen Hawking and his girlfriend/wife/what have you.

Given women are naturally hypergamous and don't love unconditionally, why would any woman stay with a disabled man? I can't think of much other than them being inherently undesirable themselves.