Arti has been trying to seek sympathies throughout the week (throughout the show, actually) and has finally got the chance now. A simple (justified) phrase is being exaggerated to no extent... and Arti is making the most of it. I won't be surprised if Salman plays angry on her behalf too. Aisi ladki, nalla, baap ki galti, i hate her, etc will all be forgiven.
I think she's a bit pissed off and jealous of Rashmi since Krushna came and hugged Rashmi and told her that he was moved by her tears. So, Arti thinks if Rashmi's tears are moving people, she should try it too. Although she tries to stop others from getting sympathy at all costs... even if they have genuine reasons to cry.
PS. Maybe she thinks finally she can call some mudda her own.