Why is Ajay Devgn wearing a nail paint?

Kajol-Ajay Devgn's daughter kills more with her sharpness and intelligence and then with her dusky looks. Daddy's darling daughter is globe-trotting with her super-star father Ajay Devgn. They were in London recently to attend a film festival. Filmmaker Leena Yadav is also in the featival promoting their film Parched. Both Kajol and Ajay are very protective about their daughter and she seldom comes in limelight. That's the reason that this father-daughter pcs is going viral. But there is one thing weird about the picture, why is Ajay Devgan waering a nail paint? See his hand surrounding her daughter's shoulders fondly. Has it something to do with his movie Shivaay, which is getting released in October