Can you CS players answer me this: did chick in picrel actually grenade herself? Or was it the enemies grenade?

I haven't played CS for over 20 years so don't know what it's like any more, but it looks like a very fast explosion? And I don't know the map etc, but the path+bounce of the grenade for it to be her grenade looks a bit sus? And there's no self-damage indicator? Nor self-assist after death?

Regardless of the grenade, I find it amusing that the dude is like "he's in on the right", so she goes in and looks right, and he's on the left. I think she was right to tell that bloke to STFU! Also she was higher up on the score board.