As the series progresses, it becomes increasingly obvious that Maxwell is smitten with Fran even though he won't admit it, and Fran is smitten with him. The show teases the viewers with their closeness and "near misses" as well as with an engagement. Towards the later seasons, they finally marry and expand their family by having fraternal twins. By the end of the series, it's also clear that Niles and C.C.'s constant sharp barbs are their bizarre form of flirtation; after a few false starts (including multiple impulsive and failed proposals from Niles), the pair marry in the series finale.