Will she live through it?

just make sure the stem is attached well, it need to be able to suck water through capillarpower thorugh that break. If you did it wrong your leaves will be lifeless in a few hours, if they still have their structure and dont fold together like a wet noodle its fine. I broke a lot of stems, no problem if a part was still attached. If it were of completly you have to use a lot pressure to get it together and the only pressure you can use then is the plants own weight and you have to stop LST till its back together. I cant see in which direction it broke or how much, but if it just broke halfway, bend it in the direction of the break, so the remaining half is pressuring the break, but be extra careful now. You can bend way more than you do if you do it very slow and next time crush the inside of the stem on places you want to bend. Between your finges without beding like this it will be bendable without breaking.