When the parents found out that the sister liked the brother-in-law, they actually wanted to make it happen. After all, the brother-in-law's family was very good, and it would be great if the younger daughter married in.
As for the elder sister, they didn't consider her at all.
In their view, everything the elder sister had was also the sister's, and the sister was owed by the elder sister. They raised the elder sister for so many years, wasn't it just for the final moment for the elder sister to bring out money for the sister's education? The elder sister disagreed, so today, the sister couldn't achieve success, but the elder sister became wealthy. No matter what, she had to compensate the sister. The sister liked the brother-in-law, so the elder sister had to give in.
Anyway, the elder sister had abilities and could find someone good later, couldn't she?
