This question mentioned how many wives Cai E had. As far as I know, there are two people who really had an engagement with Cai E and can be called Cai E's wife, but there are three people who have enough emotional ties with Cai E, and the person who has emotional ties with Cai E but no matchmaker is Fengxian Xiao.
Fengxian Xiao was originally one of the most famous singers in Beijing. She doesn't covet the splendor that Cai E can give her. In my opinion, her feelings for Cai E are not love, but gratitude. Because of Cai E's help, Fengxian Xiao will have a bright future. Therefore, Fengxian Xiao is willing to risk his life to give Cai E a chance to escape. But in the end, Fengxian Xiao was not with Cai E. I don't know exactly why. I only know that Fengxian Xiao finally married an ordinary worker and lived a plain life.
The two people who have been married to Cai E are Pan Huiying and Liu Xiazhen. In my opinion, the relationship between Cai E and Liu Xiazhen is more a matchmaker's words than real love. Liu Xiazhen is a typical woman in the old society. She and Cai E don't have much in common, so all she can do is to honor her parents and not accompany Cai E in the farmland. So, she can only live alone.