Intrusion (2015)

Intrusion aka In the Skin of the Other is a French miniseries drama starring Jonathan Zaccai, Judith El Zein and Marie Kremer. It's about a famed pianist named Philippe Kessler (Zaccai) who collapses during a performance as he begins to hallucinate. When he wakes up, he finds himself awake and in work clothes at a print shop. Everyone addresses him as Marc, the same name as his twin brother who died in a car accident with his dad years earlier as a child. He quickly discovers that Philippe does exist and looks remarkably like him. His wife and family tell him he has a neurological disorder and needs to take meds to handle it. He tries to adjust to this new life while secretly going about proving that the other guy claiming to be Philippe is an impostor. Confused?    

Intrude upon the dimly lit scene where sexy brunette Zein's character Astrid gets boinked in bed and you'll get a brief look at her left tit. You'll recognize the raging boner as yours and yours alone!