First and foremost I'm glad to hear your son will be ok! We didn't get as far as having children before our problems set in (though hope springs eternal), so I can only imagine what that must be like as a parent. I see how my sister is whenever her two year old is ill. I also remember the looks on my parents faces when I broke my leg when I was 10!
It's also nice to hear how you and your wife seemed to have a good time with some positive reminiscing! If it were me I'd definitely consider it another baby step forward - and then of course I'd be on guard for any 'expectations,' just enjoy it for what it is.
Me: 36 Her: 35 Together 7/09 Married 8/7/10 Separate rooms since at least April 11 "I've decided I want a divorce" 12/5/11 She moves out of state/files 2/7/12 Dissolution final 5/12