There's a little bit of concern when she hears Peter swear, she's frowning at him when he turns around, worried that he's done something stupid like touched the battery with a wrench but he's like, not super electrified, so it's probably fine.

And then he rudely calls her out on the ridiculous amount of bags that she has, which redirects the frown towards said bags.

"I thought you might not have been able to stock up for a little while, with everything going on. It's mostly food," If she's going to be eating heir food it only seems fair to help them restock.