No, it's six.
Guy and wife get in car crash. Sex. Sex was a dream. Wife supposedly drowns in car. Sex. Sex was a dream. No body found. Sex. Sex was a dream. Detective on his case. Sex. Sex was a dream. People murdered, think it is protagonist's fault. Sex. Sex was a dream.
I haven't finished the movie yet, but it really sort of follows a similar story as the 5th movie, just more sexy situations.