Keke told her how significant the impact would be.
First of all, it would affect their daily life, as your eldest sister would need a place to stay once she returned home, but your family didn't have any spare rooms left. Each of your three unmarried brothers had a room, and you've been sleeping in a room partitioned off from your parents'. Your sister's return means your family would need to build an addition.
Secondly, unlike you who hadn't married yet, your eldest sister was once married. Her return home would have far-reaching effects. Not to mention, out of your family, only your eldest sister-in-law had cohabited with her and shared life experiences. The other two sisters-in-law had not, which could lead to conflicts between sisters-in-law that wouldn't bode well for family unity.
