Why did Armaan Malik get angry at Kritika?

There is a lot of drama going on between the housemates in Bigg Boss's house. In a recent episode, Armaan Malik got angry with Vishal Pandey and slapped him. Vishal said he likes Kritika Malik (Armaan's second wife). Now, during the nomination task, Armaan got angry with his wife Kritika, know why?