Naughty @ 40 (2011)

Laxminarayan Kapoor lives a wealthy lifestyle in London along with his religious wife, Maya; son Ravinder; and two nephews, Sandeep and Randeep. While the nephews have adapted themselves to the country and women, Ravinder is still a virgin at 40, and is a sleep-walker. After getting his leg pulled constantly, he asks his father to get him married, and is introduced to a statuesque beauty - who rejects him after discovering his sleep-walking disorder. His parents then get him married to Gauri, and he hopes to end his celibacy, in vain albeit, as she turns out to be child-like and naive. Frustrated, unable to get intimate he befriends a Caucasian female, Sharon, and decides to marry her. Watch what response he gets, and the impact this has on everyone.

Source: TMDb