When Lin Wei and Lin Sui found out that Song Yan was going to stay the night, they did not say anything much and agreed. Although the two of them were in a bad mood because of their spouses, they were not unreasonable. They believed that Song Yan was worried about their mother and was staying at their home because she was truly worried.
Compared to many hypocritical students of their mother, Song Yan seemed better.
Thus they readily agreed to whatever arrangement their sister-in-law came up with.
Even going as far as opening the biggest guest room for Song Yan.
This was also one of the reasons why Song Yan was willing to help Madam Lin. Even though she did something wrong, she was a good woman by heart and her family was just as kind.
It wasn't her fault that her kindness was being reciprocated in this way.