A/N: Presumably takes place after Ant-Man and the Wasp, but doesn't adhere to canon (especially that end-credits scene).
Prompt is: "Your OTP gets caught under the mistletoe"
"What do you think, Cassie?" Scott asked, holding up two different ornaments. One was a small picture frame with their faces in it. Both of them were grinning, their faces stained with red and green frosting from the cookies they had been baking and decorating. The other was a pinecone covered with paint and rolled in glitter that Cassie had made in kindergarten. "Which one is it?"
Cassie scrunched up her nose as she looked between the two choices. "Both of them!" she decided finally, pointing at the Christmas tree that was practically falling over with all the ornaments, tinsel, lights, and garland it was covered with.
Scott laughed, carefully hanging both decorations on the tree. "Looks great, kiddo."
"That tree has enough Christmas decorations on it for the whole house."
Cassie and Scott turned around at the same time to see Hope coming in through the door, still dressed in her lab coat. She paused to take off her shoes and froze when Cassie started laughing again.
"What's so funny?" she asked with a smile.
Standing up, Scott started laughing as well. "You know how we decorated the house today?" he asked rhetorically. "Well, Cassie insisted – her idea, just so we're clear – that we should put up mistletoe."
Hope was caught off-guard for a moment, and then chuckled. "Scott, did you actually…" Looking up, she saw a small sprig of mistletoe tacked to the ceiling right above where she was standing. "You did," she answered herself, still laughing.
"Kiss him, kiss him!" Cassie chanted, bouncing up and down.
Scott grinned. "C'mon, you wouldn't want to disappoint the kid, would you?"
Hope rolled her eyes and took a step towards Scott. "I wouldn't want to disappoint myself either," she said with a grin.