Arpita is worried about Yash. First I thought Yash is her husband, but in the end you revealed that he is her brother. Arpita sees Yash as her brother and worried for him. But in second chapter you said that Arpita is Aarti's sister, and with whom Yash goes at the wedding day.
Yash is not biological son of SP and Gayatri, so I think they had forced Yash to not marry Aarti as their son Prashant wants to marry her. It's my guess, maybe it's true. That's why he had leave Aarti at mandap. I thought it because Yash mumbling something in unconscious state that Aarti don't go.
I guess maybe Yash had brain tumor as Aman is talking about surgery. Pls. do clear my questions. But I am happy that Yash is Arpita's brother. And the spoiler is great. Waiting for it.
Thanks for the PM.