No problem. I wondered about the same thing until it turned out I was the trans one :P

There are lots of ways coming out could have gone horribly wrong, but I figured there were three “right” options.

1. Wife isn’t interested in being married to a woman. Fair enough; result is an amicable split, presumably sharing child-raising responsibilities.
2. Wife not attracted to women but wants to stay together. Continue to cohabit as some kind of non-sexual family unit, possibly seeing other people on the side.
3. Wife realizes she’s bi / willing to make an exception. Lesbian partners!

I guess I was prepared for 1, expecting 2, and hoping for 3. Currently at 2, but it could go either way.

In any event, I think it’s unreasonable to expect someone who needs to transition to put it off for the sake of their partner, although not every trans person needs to transition.