Ah! Yes, encountering something similar...
I have a latex sensitivity. I didn't even realize latex was a problem until a co-worker noticed the rashes I was getting on my hands from latex gloves (I'm a scientist, it comes with the territory) and gave me nitrile. I've known a few people who ignored their latex sensitivity and it worsened to the point where they cannot enter a room that has latex without severe issues.
You want to keep her away from latex as much as possible. These things build. What is an annoyance for her today may lead to anaphylactic shock tomorrow. The more exposure, the worse it gets.
Here are some brands of non-latex condoms to check out:
Lifestyles Skyn
Naturalamb
Trojan Supra