I wholeheartedly agree with the whole "your wife is smart and has free will" range of responses, so I will refrain from repeating other members.
I would however just like to touch on the parenting aspect of your post...
Together with your wife, and possibly your T, discuss the reasons, the core reason behind not wanting to have children. You never know, there may be a way to compromise, a way to work around your apprehension, but you wont know unless you discuss it with your wife.
I myself have a daughter. I'm a single mother and have up until recently maintained that I will NEVER have another child, even though that thought has secretly saddened me for the past 5 years.
My bf always seemed accepting of this decision, but recently we sat down and discussed my whys and his desire to be a father one day.
We came to the realization that there is a way around my absolute no. See I can't do the fulltime mother thing, not only does my bipolar sometimes have me basically incapacitated during depressions, but I lack the 24 /7 nurturing gland. However that being said, I do love my daughter more than words could ever describe and have always put her needs first. Apparently, much to my surprise I'm actually a bloody good mother
So we came to the conclusion that if and only IF, we are in the position to employ a nanny to help me out, say on a half day basis, then and only then could we plan to have a baby together.
Didn't mean to type a winding post, but hope I managed to bring across my point.
Communication is key, please don't accept its an absolute nono before discussing with your wife.