She gets involved because she's getting attached to them all. Ruhi included. And shes a fixer. A do gooder.
Ruhi publicly got in a tiff. Shes seen before how much Armaan fusses over Ruhi and vice versa. She's innocent enough to trust they are only friends and is only trying to help.
I don't see anything wrong. She has never seen them fight before like this. Plus there was an event at home.
On the contrary both of them vented at her for no reason. They could have simply told her to let it be. But they chose to take out gussa on her.
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