Lin Dong only occasionally came back, so he didn't know about the change between his eldest sister and his second brother.
Lin Qiu, however, was sensitive enough to notice the difference. Lately, her second brother seldom came home for meals, and her sister treated him very politely.
How come their attitudes seem to have changed now?
In her opinion, both Brother Lu and her second brother were good people, and she had no objections to either being her brother-in-law.
Moreover, compared to Brother Lu, who was farther away and less familiar, she felt even closer and more comfortable with her second brother.
If Mrs. Zhao really became her sister's mother-in-law, she would definitely treat her sister well.
The only trouble might be Jiang Mingqing, the little sister-in-law, but then she thought a woman would eventually get married, so it didn't really matter.