1. Sajan and Mayur will have their own seperate discussion in which Samrat will console Gunjan saying that Nupur is very upset with the Bauji's treatment and that's why she is behaving this way and Gunjan should not mind all this... Whereas Mayank will console Nupur saying that Gunjan had been with her throughout the marriage track in her tough time and she shouldn't be upset with her.
2. Second solution (which i feel would be the best if CVs show us this): Sayank and the gang make a plan which goes like this: Samrat will go to Nupur and Mayank will go to Gunjan. Samrat should talk little negative about gunjan saying that she doesnt understand her sister which will make Nupur angry at Samrat as she cannot listen anything bad about her sister. Similarly Mayank will say gunjan that Nupur is elder to her and still she is behaving like a kid and its worng on her part which will make gunjan feel bad as she also cannot listen anything bad about her sister.
Ultimately Gunur will sort out differences...
Do suggest what you guys feel about this and what possible solution you can think of...