Precious lovebirds. They’re walking so close together, they might as well be holding hands.
Also, this seems like a modern-day version of Lizzie and Darcy walking together. “Thanks so much for saving my sister from prostitution.” - “I don’t care about her. I did it all for you. Let’s get married.”
Except that in this case it’s more like, “Let’s have sex rubb off all over each other.”