Think about it . If RK told him all in the letter he most have also told him . The bride I picked is for your brother please unite them because THAT was RK's dying wish. To unite vitharv as a way of getting in to atharva's good graces.
Let's for argument sake he doesn't know the guy in his closet is his brother. And he is still looking .
I still will like to know if he is aware vv was to marry someone . Because am sure RK
Would ha ve mention Vividha and Atharva by name.