For the first couple weeks, after that she will discover that sign language is easier than typing all the time. Of course this assumes both make a concentrated effort to learn the language. Once basic conversations can be had in sign language the rest comes. There is a small community of deaf people where ever you are that you can join so you won't be alone in your world which is important both for learned faster and for psychological reasons.

Fortunately the effort can be done anytime after the fact, so if she is lucky it might not be done at all.