i forgot that she was in her early 30's. if you still want to do it, go in the shop have a 'look around' and she'll be drawn to some things. then as she goes off, pick up one that she was looking at, pay for it, and give it to her at the sushi place.
edit- to disguise what you're doing pick something else up and say you're buying it for a brother/ sister or someone.
They called us a dead generation,
They told us that we wouldn't survive
They left us alone in the maelstrom
As you can see we're all clearly alive.