Two and a Half Men S02 E08 Frankenstein and the Horny Villagers

"Two adults. One kid. No grown-ups."

Alan meets a woman named Nancy at a grocery store, who fulfills every single one of his desires, forcing Charlie to take care of Jake. After knowing Nancy for a few days Alan decides to ask her to marry him, prompting Charlie to try and talk him out of it, and he even gets help from the brothers' mother.