As a classic drama, treading on thin ice, why didn't Lvwu marry thirteen elder brothers?

Lvwu is the confidante of 13th Brother. 13th Brother is a free and unrestrained elder brother. He doesn't like being restricted by palace rules and has done many things that yearn for freedom. His ability to be friends with everyone shows that he is particularly tolerant. Lv Wu is the person who knows thirteen elder brothers best. He finally chose to leave without marrying thirteen elder brothers because of his humble status, fearing that his identity would affect thirteen elder brothers and their children.

Lvwu wants to protect the wayward 13th Brother and fight for 13th Brother

In treading on thin ice's classic play, I like 13th Brother best. He lives a very detached and free life, and he sees clearly the character of everyone around him. He only cheered with four elder brothers and was very loyal to his friends. In the factional dispute, four elder brothers were almost punished by the emperor. It was thirteen elder brothers who undertook everything for him, and was sentenced to 1 years imprisonment by the emperor, which is enough to show how loyal thirteen elder brothers are. Brother Thirteen had a good marriage before, that is, he married Min Min Gege on the Mongolian grassland, but he didn't love it, so he refused, and he was not afraid to make the emperor angry, which shows how casual he is. Lvwu is a woman he knows among the people, who is intellectual and sensible, and is his confidante. The two people have always been polite and courteous, and never overstepped the rules, so she won the favor of thirteen elder brothers. Everything Lvwu does is for the sake of thirteen elder brothers, and this is true love. Lvwu's status is humble. In order to prevent Brother Thirteen from being squeezed out and laughed at by others, and to prevent her children from being discriminated against

Lvwu was originally a good family, but unfortunately, she was forced to go to Yanhuaxiang and become a singer, but she never showed mercy to those buddies. Her kindness was only for thirteen elder brothers, who were imprisoned for 1 years, that is, fourteen elder brothers and Ruoxi, whom Lvwu went to ask for, and finally asked the emperor to allow her to spend 1 years with thirteen elder brothers, which was no match for anyone. Later, Fang Fujin, jealous of Lvwu, said that her identity was a disgrace to thirteen elder brothers, and all the ministers in the DPRK laughed at thirteen elder brothers. Lvwu was kind, and finally she chose to throw herself into the lake. In order to protect thirteen elder brothers and her daughter, it was really miserable.

In this short life, Lvwu sacrificed for others and love, so Brother Thirteen liked her so much and suffered so much after her death, which can be regarded as the true feelings of the world. Alas, it's just a pity that the love ending is not very good. What do you think?