Not sure why this is in the abortion debate forum but I have to agree with purestgreen, why should your wife have "humoured you" for five mins when she clearly didn't want sex?
Seriously, hypothyroidism is linked to depression (in that depression is one of the symptoms, amongst the weight gain you mentioned) but it can be exceptionally difficult for people who are suffering and feeling low to allow anyone to help them. I understand you would get frustrated but remeber your vows? "sickness and in health".
Once the illness had been taken care of and she dropped back to the weight she was previously she was back to the woman you matrried, the "whole package" - well i'm sorry but marriage is about more than looks and it seems kind of shallow to me...
Anyway, this has
nothing to do with this forum!