It was where where he was paired up with Shilpa. Kangana was there as well in the movie but she was with Shreyas Talpade and Irfan Khan was with the other one. It was where Shreyas gives keys to his flat to his boss and his boss takes Kangna there to have sex with her without his wife Shilpa knowing about it and Shilpa in return is having an affair with Shiney.
Yes, I've seen that movie. She goes back to her husband. I was hoping for a different ending.