How does Fariba immediately reassume her motherly duties?

When the Mujahideen members come to Kabil, Fariba immediately feels as if the day has finally come to bring peace to Noor and Ahmad. Fariba stops mourning and throws a party. She rises out of bed and discusses marriage and Tariq with Laila. Laila reassures that Tariq was like her brother, but Fariba warns Laila to avoid gossip. Laila realizes that she has fallen in love with Tariq and she begins to notice that other people have noticed as well.