Given Rosa’s story, I bet this is ultimately a roundabout form of self harm on her part
She got over that already in her little heart-to-heart with Zima, which happened soon after the whole bunch was brought to Rhodes in the first place. If anything her text implies these days she'd willingly sacrifice her relationship with the rest of the group if it would help them get over their damage (she definitely has the best grasp of her own issues and unlike the others actually recognizes you can't just bottle that shit in).
...anyways I literally couldn't take this one seriously anymore after that absolutely derpy face Zima makes on the last page XD