There is a lot of deviation from Rishta.
Manyu wanted Akshu, his first conversation with her was sorry. Then he saw the concern she showed when he nearly died and decided she still wanted him, both her and Nav gave him a reality check.
Then it moved to custody battle.
Here it will be Diljeet vs Angad for the kids custody. Sahiba ka koi kaam nahi, bas sabse gaali khayegi, only Diljeet will support her.
Baaki i guess Diljeet will die and kid will start considering Angad his dad and ask for Sahiba, toh aise hogi reunion.