I understand how your wife feels, Amy. I said the same thing to my partner. The last photo he sent me, I just saw a female and I cried. I nearly deleted it but kept it in the end. He's been on HRT for 5 months now. I haven't noticed any behavioural or mental changes at all but I do see physical things, the breasts being the most obvious. I see subtle changes in his face, but he doesn't. It's definitely softer, and he looks younger. He too doesn't want to come out socially - maybe not ever. I don't think anyone else has noticed, but maybe it's because I know what's going on, it makes me more aware. The last month has hit me the hardest.
I too hate this trans thing, more than anything in the world, but it's here, it's happening and we can't deny it, so we both have to deal with it.