You decided to invite Wonder Woman over to your place for the holidays to show her about customs in the realm of man. It came to a head when you two went under the mistletoe.

"So... you hang a plant up to kiss someone with?" Diana asks, thinking of things she can compare it to. “…I don’t think we have anything like this in Themyscira. How fun!” She takes your hands in hers and smiles, leaning closer to your face. “Shall we?”