Sarah's poem is about the moment someone realizes that ending a relationship can hurt terribly and feel right at the same time. The speaker describes sitting on a shower floor at 3pm, arms wrapped around their knees, crying over a breakup that both people needed but neither wanted.
The setting does a lot of work. A shower is private, and the speaker curls up like someone trying to hold themselves together. The time, mid-afternoon, is oddly ordinary, as if the heartbreak has arrived in the middle of a normal day with no drama to announce it. The words "killed us" show how deep the pain goes, while "the best thing" shows the speaker understands the choice was healthy.
The mood is quiet, tender, and sad, but not bitter. There's no blame here. Calling themselves "two broken kids" suggests the speaker sees both people with compassion, as young and hurting, and still trying to do right by each other. The peace in the title comes from that acceptance.