Damn, that's cold.  You can tell that the problems in their relationship at the start are just getting stressed further.
I get that it's her job and it's her choice, but at the same time, does she not realize that it's having a big effect on her partner?  Pro tip: when it's something important, talk it over with your partner ahead of time.  Heck, it was a lack of communication that really kicked off this whole mess in the first place.