Actually today sona said all what we want to listen, we want to know how much she is aware about dev's feelings, his sacrifice of love for the sake of his mother happiness.
She understood that there is no one with whom he can share his pain, he is all shattered and broken.
She can't listen anything bad about dev and just started shouting at elena. She wants everyone to know that dev still loves her and the reason behind the breakup decision.
Really felt good after listening all this from sona and after watching all this roka ho ya shaadi ke mandap mein bhi aajaye sona, for sure devakshi will become one.