So they showed Abhinav and Abhimanyu holding Abhir (equally) and then Abhinav gives Abhir to Abhimanyu.
Then they showed Arohi and Akshara hugging, basically Arohi supporting Akshara in this tough time.
Abhir then told Abhimanyu to save his life for his parents but especially for his father.
I've a feeling that once Abhir's truth is out, they'll move towards a co-parenting track for a while, and Abhimanyu-Arohi’s wedding will be postponed due to this surgery.
Then Abhinav may pass away in an accident and they'll move towards Abhimanyu Akshara reunion while Arohi is insecure about Ruhi's and her own place in Abhimanyu's life.