Then that makes it worse that she chose to do what she did. Yikes... (unless you choose to cheat on her which would then make her justified after the fact... and most players are going to cheat)
(After re-reading her choice, it's even dumber to me now... like wtf is wrong with her? It's indeed an idiotic test despite her not looking for a separation, divorce, or an open relationship.)
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Oof, I had that happen with a girlfriend twice. The second time she asked for a break I said we should just break it off. She got super pissed, swiftly walked away and we never spoke again. No regrets from me.
I don't fully understand "breaks" in relationships anyway. I can understand physically separating for a while (to cool off from burnout, disagreements or other stressors) but then I'd still consider fooling around with others during that time to be cheating.