It's legendary actress Nargis Dutt's 90th birth anniversary, and her son Sanjay Dutt couldn't help but remember his mom on the special day. Sanjay took to Instagram to share a black-and-white picture with Nargis, and wrote,Memories never fade! Happy Birthday Mom.In the throwback picture, Nargis can be seen in a salwar kameez as she holds one of her daughters on Sanjay's back.