Anyone knows this movie?

I saw a film long time back maybe in 80s / 90s. It was about how a High Profile man hires a bodyguard for his wife whose life is under threat. I don't recollect any actors. However I remember the end, towards the end its revealed that it was the the husband himself was trying to kill the wife, the one who hired the bodyguard.

Has anyone seen a film which resembles this plot?