Movies like "My wife is an actress"
 

the movie is about a guy who is married to a hot actress gets worried when she has to do a nude sex scene with her famous costar in her next movie This worry turns into jealousy. I find this topic is very sexy where a husband/boyfriend of an actress has to deal with sex scenes scripted in a movie with there partners, it's usually "a movie-in- a movie" storyline. I wonder if there is any more example of this ?

Love scenes (!984)
 

"Love scenes" is a movie come in mind, the storyline is about an acclaimed actress surprisingly accepts the lead role in an erotic film directed by her husband. At the begining the wife was hesitating to do the job because of all of the love scenes and that her husband will be the director, but finally she agreed to do the movie where her husband/director starts to get jealous and suspicious.

The Dramatics : A Comedy (2015)
 

The best movie that comes in mind and have the same sexy theme is "The Dramatics : A Comedy (2015)", it's a romantic comedy about an actress who stars in a sexually explicit mini-series adaptation of a best-selling erotic novel, and her loving boyfriend is forced to deal with all the nudity and rough love scenes that comes along with the mini-series.

Not quite what you're looking for, but Kerry Fox's then-boyfriend/now-husband did a writeup for The Guardian about his thoughts when she blew Mark Rylance in Intimacy

hxxps://www.theguardian.com/film/2001/jun/22/features.features11

Thank you for your contribution, it is very interesting that what Im looking for is exactly the same real plot that you brought, do they do movies with such stories ?!

Love scenes
 

I have tried to find that movie Love Scenes for years! I saw it when I was a kid and have never been able to find out what it was called. Thanks

Broken City (2013)
 

The idea of a jealous husband of his actress wife love scenes in a movie within a movie based was a subplot in the movie "Broken City (2013)".

Intimacy
 

Thanks for a very interesting real-life examination of the boyfriend's feelings about his partner being fully nude and simulating strong sex but also giving another man a real blowjob to be immortalized on screen. Their "infidelity" limit was penetrative penis-vagina sex.

The full version of The Guardian article is here
httpx://www.prospectmagazine.co.uk/magazine/watchingher

I read that actresses in hard porn can have difficulty maintaining relationships with men (who are not also in porn) because of the jealousy and also that she can come home and be too tired or sore for sex with her husband because of a hard day's shagging other men.