Anyone remember this movie?!

About 3 -4 yrs ago, there was this movie i watched but later turned out to be full on porn with a story line. But i cant seem to remember the title of it. The story was one of the brother betrays another and gets killed when found out at the end. The scenes kind of starts at a prison bar where a female lawyer comes with papers where the man masturbates to her naked pussy. Later she returns to her office and have sex at her office in the after hours. There was lot of other sex scenes, even a gangbang inside a big tunnel. For the life of me, i cant find it anywhere. Does anyone here know about it?!