Ultimatums

I was reading Reid Vanderbergh’s soon-to-be-published book and he mentioned how the wives of MTFs are doing reasonably well when they “were able to wrap their minds around the transition sufficiently that they did not leave the relationship, or deliver an ultimatum (“move forward with this transition and it’s over.”).”
& I was thinking, what difference is there between his example of an ultimatum:

Quote:

move forward with this transition and it’s over

and what i’ve said to betty:

Quote:

i’m pretty sure i won’t be able to love a woman so transitioning may mean the end of our relationship.

Because I honestly don’t know. Obviously tone and concern and trying to deal, yes, but ultimately, is there any difference? I’m not so sure there is.