The first time I visited Meg’s house, she took me upstairs to her room, and I wound up trying on her clothes. We were pretty much the same size, since Meg was shorter and thinner than average. Maybe that’s how we became friends in the first place. Wearing Meg’s jeans and T-shirt, I looked at myself in the mirror. I could almost pass for American – from the back, anyway. At least the kids in school wouldn’t stop and stare at me in the hallways, which was what they did when they saw me in my white blouse and navy blue skirt that went a couple of inches below the knees. —"The All-American Slurp,"
Lensey Namioka

How does the event described in this passage move the plot forward?
answer very fast pls