Actually, to be blunt here myself that had to be the most shallow moment we've seen from this generation of children yet.
She has a right to be upset, but implying that Sakura's life has absolutely no value to her just because they might not be blood related is a joke. And not a funny one. It's a pathetic standard to show love. One that Kishimoto will reveal the ridiculousness nature behind. Sakura is still the woman who spent 13 years raising her.
Kishimoto said he didn't give her Sasuke's personality since that would be scary... she has Sakura's personality/presence.