As far as I can tell, some of the aspects in your images are in line with Moringa concanensis. To my knowledge, pink-tinged flowers are not described in M. oleifera.
Introgressions between M. concanensis and M. oleifera are known to occur in India. Since the former has not been reported from Nepal and the tree posted by Saroj ji being cultivated, it would be interesting to investigate if this is a true M. concanensis or an outcome of hybrid seed.
Best wishes, Viplav