Kyunki Saas Bhi Kabhi Bahu Thi

The Viranis plan a family outing. Mihir says he will come for the picnic only if Karan joins them. Savita informs Mihir than Karan can come along for the picnic but is still not allowed to enter the house. When Savita goes to invite Karan, she sees Nandini there. What was Nandini doing at Karan’s place?