Dina Lohan left Lindsay's deposition at 12:30 to grab lunch for the group with a couple of assistants.

X17online photogs asked her she was "tired" from "partying all night" with Lindsay, but Dina stayed mum as she got into the car.

When she returned with lunch, photogs asked "how's the deposition going?" but Dina refused to comment.

Lindsay's currently talking to lawyers about a 2007 incident in which she's accused of hijacking a car with unwilling passengers which led to a DUI charge.

Last night, Lindsay and her mom, who had just arrived in LA from NYC, were out together until 2:30am.