Can I ask if all three of them are fed at the same time?
Maybe Rose is trying to establish dominance? What would happen if you fed the other two first and sat with Rose to watch them eat first? While training her to stay? Maybe sit with her and watch them eat while giving her a back rub?
Or...do you free feed? Then my suggestion wouldn't work
Or maybe the question is, is she aggressive only when others eat, when she's eating, or when everyone is eating? lol