Person A of your OTP makes Person B dinner, only to find out that B is allergic to something in the food.
Raven was making dinner for her and Beast Boy's date. She didn't realize that she was making real food, instead of tofu. Since Beast Boy, was a vegetarian he couldn't eat meat.
She just finished making dinner, and Beast Boy came in the kitchen. "Smells good!" Beast Boy said with a smile on his face.
"It's done." She said, as she served both of them.
"Great." He said, as they both sat down.
They started eating it, until Beast Boy noticed something different about the food. He ate another bite, and then realized what he was eating. His eyes went wide, and basically spat out the food.
Raven noticed this, and raised one eyebrow. "Is something wrong with the food?" She asked.
"I-I think I just ate meat." He said, rubbing his tongue, trying to get the meat out.
"Oops. Sorry I forgot to make yours tofu." She said, feeling half sorry, and half amused, while trying to stop the smile creeping on her face.
"Yeah right." Beast Boy said.
"I mean it!" She said, while trying not to laugh.
"How could you not realize you gave me meat!" He asked, somewhat angrily.
"I just didn't notice." She said, while laughing.
"So you knew you were giving me meat?" He asked.
"Maybe. I just wanted to tell if you could tell the difference." She said, while still laughing.
They both didn't know what to say after. Beast Boy was still mad at Raven, and she was still laughing about the whole incident. "Meat is the grossest thing I've ever eaten!" He said.
"It's not that bad!" She said. "Why don't you eat meat anyway?" She asked.
He knew that the answer was kind of obvious, but he did anyway. "I turn into most of those animals that you eat!" He exclaimed.
"Sorry I didn't know you felt so strongly about animals." She said, knowing it would just make him more annoyed.
"How can I not? I change into animals!" He yelled.
"I guess I was wrong." She said, giving Beast Boy a small kiss.
A/N: I know being a vegetarian isn't the same as being allergic to meat, but it was the closest thing I could do to make this prompt work. Review!