She very clearly tries to grab a drink out of his hands as he's picking it up. He then, yes, throws it into her face after it started to spill (she's grabbing at the bottom of the glass while he's holding the top, so it sloshes out). She then aggressively steps up into him to slap him (right hand up, coming down to the left). She pushes her back, then steps, aggressively into her space (she's already on the ground) with a right front kick to her right hip, putting her on the ground again.

She gets up from this as he's trying to de-escalate by leaving the situation (he picks up his bag and phone, is heading away) and she picks up a weapon (a bottle). He then throat punch/ pushes her back to the ground, and continues to leave the situation.

She initiated the conflict, and at I'd say 3/4 escalation points where the conflict escalated, she initiated the escalation. She grabbed the glass out of his hand (initiation), she stepped into his space to slap him (escalation), he front kicked her to the ground after she was trying to get back up (escalation), she picked up a weapon as he tried to leave (escalation).