Marx and Venus S01E04 - Changing Rooms

Now it's just the two of them sharing the flat, Venus insists on paying half the rent and Marx offers to switch his larger room for hers. Venus is thrilled and accepts immediately. But later that night she receives an unexpected visitor. Come morning Venus has to wonder if Marx had an ulterior motive for swapping rooms. Or if he's more embarrassed than she is about the surprise midnight encounter?