The first film starred Jimmy Shergill, Randeep Hooda and Mahie Gill as lovers.
He told The Times of India: "I had full faith in the subject of Saheb Biwi Aur Gangster Returns. Also, I am in line with the makers' conviction vis-a-vis treatment of the film."
A source added: "[Director] Tigmanshu Dhulia and Irrfan share a great rapport. When they went on floors with the film, they had a brainstorming session over the amount of skin show.
"Irrfan was of the opinion that with a strong script, the project required no steamy scenes."
Dhulia confirmed: "There are some romantic scenes between Irrfan and the two lead actresses Mahie Gill and Soha Ali Khan. And they have been shot aesthetically."
Khan replaced the producers' original choice Neil Nitin Mukesh, who said that he did not want to play a "horny, mean husband" again after Saat Moon Khaf.
The Slumdog Millionaire admitted in March that he is still not comfortable singing and dancing on screen.