Super{Delivery}Girl
"You!" Lena shouted angrily, pointing an accusing finger at her.
She jabbed a finger in the hero's chest, "Why do you insist on feeding me?!" she accused, "What do you have to gain from it all, hmm?!" her eyes were predatory, filled to the brim with frustration.
"M-Ms. Luthor, I don't know what you're talking about." Supergirl stuttered.
"The coffees, and croissants, and sushi, and salads. All of it! Why are you bringing me food everyday? I'm not crazy, I've seen your cape flying about! I'm more than capable of feeding myself, you don't need to bring me food, Supergirl!"
AKA
The fic where Jess goes on vacation and appoints Supergirl the responsibility of making sure Ms. Luthor is well fed and food randomly starts showing up on Lena’s balcony and Lena is very very confused.