I feel like leela is taking it to far and not thinking straight. Yes twinkle lied to her for years about her and yuvi relationship and so feeling betrayed is a normal reaction. But how is leela not seeing that twinkle sacrificed her love for leela and married someone she doesnt love just for leela? And she didnt lie to kunj he knows everything. It would be different i think if twinkle betrayed her ran off with yuvi or betrayed her and kept all of this a secret and married kunj who is unaware of everything.
Idk.
But good thing coming from this i think is kunj will be supporting and therefor twinkle.