What does this mean?

It was only during dinner that Gu Xin found out that this aunt Yu was Lu Zheng's mother, Zhou Shi's servant girl who had been accompanying her ever since she arrived in the capital.

After the death of Mrs Zhou, aunt Yu took care of Lu Xue until Lu Xue got married. Aunt Yu's slave record was released. Aunt Yu had some savings and opened a small restaurant here. It was not big, but with Lu Xue and Lu Yang taking care of it, the past few years had been peaceful without any major twists and turns.

Lu Zheng told Gu Xin that all he knew about his mother, other than from Grandpa Zhou and grandma Xiao, was from Auntie Yu.

Gu Xin had a good impression of Auntie Yu after hearing this. More importantly, Auntie Yu's cooking skills were very good. Gu Xin ate three big bowls of rice that night and finished all the dishes on the table.

Looking at Gu Xin's good appetite, Auntie Yu was also quite happy.