It's the afternoon, and they're curled up in bed together, Mimi's cheek pressed against Roger's chest. She's listening to his heartbeat, her fingers in his hair, thinking.
At length, she raises her head, looks him in the eyes, and says, softly and sincerely, "I think we should have sex with Mark."
There's only one thing left, and it's really something Mimi needs Roger for.
Which is why she emerges from the bathroom wearing the tightest red dress she owns, with a matching pair of heels, carrying a purse and sauntering past him on the way to the door.
This would be the reason why, upon returning to her apartment after a brief trip to the bar, she slams the door loudly behind her, cursing in a combination of Spanish and English.