Headcanon: Kara shops at stores like costco because she can buy bigger packages of food and it doesn’t cost a fortune. It started out as just her and Alex and they would pool their groceries into one kart and Alex would pay Kara for her portion. When J’onn found out that they did this he offered them a DEO issued credit card and SUV so they could make monthly trips and really stock up. After Winn started seeing the charges to the DEO credit card he tried giving a list to Alex who just raised a brow, prompting Kara to take the list. He knew his groceries wouldn’t even create a dent in the amount Kara spent, he doesn’t remember the last time he bought his own coffee creamer.
Then Maggie and Alex started dating and her and Alex started taking their own kart. Which prompted a few shenanigans, including Maggie standing in the middle of the aisle with her hands above her head while Kara and Alex lined up their karts. At the drop of her hands Kara and Alex would push off coasting down the aisle seeing who could make it to the end first. The first time they did it Alex yelled that Kara cheated and used her superpowers to win. The next time they raced Alex broke her finger when their carts rammed into each other and told J’onn that she had broken it when she tripped in her apartment. He didn’t need to read her mind to know she was lying.
When Lena and Kara started dating, Lena insisted that she go with them. She had never been inside a costco and wanted the full experience. Plus she wanted to help pay for the groceries now that she was feeding Kara at her place too. Maggie and Alex followed the other two around shaking their heads and sharing knowing smiles as they heard Lena trying to convince Kara that she there was no point in buying bulk if she didn’t buy the rights foods, that she needed to buy food with more substance than chips and ice cream. Kara smiled gratefully as Alex and Maggie snuck things in their kart for Kara every time Lena had her back turned. When they got home Lena pretended not to notice the sudden addition of foods she didn’t remember them picking out letting them all think that they were being sneaky.
brought to you by @littlestdanvers and myself