Life teaches everybody through tough lessons.
Don't think it has got anything to do with apna praya.
Infact Anandi forgave DB for only things that she has done to her but she never forgave her fo insulting Shiv.
DB was begging them not to tell anyone else. Shiv decided to keep quiet because Anandi requested him. This same DB was insulting Shiv for listening to wife's words and dancing to her tunes in front of the family that's when she told Daddu what this lady had done.
What did Sanchi do to Anandi except for being a nuisance?She brought more pain to her own parents with her behavior and all the troubles she invited upon herself with her own stupidity.
Nidhi and her mother resembled Sanchi and Ira. Sanchi's parents gave in to Sachi's stupid wishes because they couldn't cope with her stubbornness.
Here Nidhi's mother is doing the same with Nidhi.
What Anandi learnt by observing Sanchi and her parents is putting it to practice now.
If family has been treated with kid gloves Anop would not have gotten into jail at all. She is the one who gave information to police on Anop's activities.
Anandi only forgives who hurt HER but doesn't forgive people who hurt her loved ones or who hurt innocent people or people who are weaker than them.