You are right. Kul is beyond polite words...
I know Kul loves Sujata and wants to give Sujata the man she loves (Raghav), but Kul overreaches and does not think of the consequences of her actions <on behalf of her daughters>. Though it is due more to snobbery, Nupur does not like Kul and neither does Raghav's father. Why? She keeps pushing her daughters onto people that have issues with them, right or wrong. Is that fair?
See this is what I made a point about some time back. She does not THINK beyond her "optimistic" take on reality. She sometimes fails to think how her actions "negatively" affect her daughters. Right now, Kul has tunnel vision and confidence: Trishna's happy, Tanya is being cared for. Now Sujata's turn...all will be well. She is thinking she was right!