Some cheating wives movies I've found and watched recently I recommend.  I don't care too much watching movies from a streaming services (besides tubi and amazon prime) but I torrent movies and I use playon app to download movies on streaming services such as tubi and prime.  It may just apply and works for folks here in US.  but if you get the chance, and if you haven't check out the following movies. 

Only People (2018) US.  I torrented this from Yts.mx.  Simple movie of two married people meeting up on a weekend while telling their spouses they are away on a business and have a tryst with each other.  I found the premise and plot hot and sex scenes hot. 

The Devil Inside (2020) French.  I watched it on Tubi (free, ad, US)  I love films like these where an older, professional, prim, and proper wife gets seduced by a younger man/bad boy and she hides her affair from her family but can't stop the affair.  Besides the restroom sex scene, there's no explicit or nude sex scenes but the build up and tension is extremely hot for me. 

The Deliquent Season (2018) UK/Ireland.  I torrented this from Rarbg.  Two sets of couple who are friends, a husband (Cillian Murphy) of one starts an affair with the wife of the other couple.  Sex scenes are hot, the wife is hot in her housewife way, and I love affair movies involving two married couples.  The build up and the secrecy they hide from their spouses are hot. 

LFO (2013) Swedish.  Watched this on Tubi as well.  An old ugly nerd finds a way to mind control with sound.  He has new neighbors, a nice looking young couple move across his house.  He uses his new found 'power' to make the husband wash his windows and do other chores around his house, while the nerd shags the neighbor's pretty wife.  Pretty hot. 

Paint (2020) US.  Watched this on Tubi.  Story of bunch of art students.  One paints a nude portrait of his fellow art student friends mom, and ends up shagging her.  Little nudity and no sex scene but the implication leading up to it and the dialogue after is pretty hot. 

The Canal (2014)  UK/Ireland.  Torrented from Rarbg.  It's a horror movie, which is pretty well done.  But the first part of the movie is pretty hot.  The protagonist buys house with his beautiful pregnant wife.  Then we see they have a child, she works, they go to her work party and she's bit too close to her coworker.  Our main guy suspects something and trails her and her coworker when she told her hubby she's working late.  The two lovers walk past a canal to an abandoned building.  Our protagonist witnessed his wife fucking her coworker.  The scene is pretty hot and the wife is damn hot too. 

Shooting the Warwicks (2015) US.  Torrented from Rarbg.  Documentary style movie.  It's like the Truman show but the reality tv producers follow the happy and functional Warwick family.  Then they plant and scheme things to create chaos and dysfunction in the family.  Including planting an actor to seduce the mom/wife Mrs. Warwick.  Lots of sex and bit of gore at the end, but the actress playing Mrs. Warwick has a nice MILF body and there's plenty somewhat explicit sex scenes.  Pretty hot. 

*Request.  If anyone has a very good quality (1080p) of Ei Kiitos (aka No Thank You, 2014) a Swedish movie that they can share, I would really appreciate it and willing to share movies I own. 

Long time lurker, first time post.  I love this thread it gave me few recommendations I didn't know about that I found it very arousing and hot.  Like some of the comments above, I like the happily married "faithful" innocent type of wives and girlfriends that succumb to seduction or out of curiosity gets into an affair (behind their husbands' back, as I'm not a fan of cuckold or hubby finding out although most mainstream affair movies like Unfaithful ends with the husband finding out about the affair for the sake of plot, drama, and closure)

Here are few of my favorites.

1)  Ei Kiitos (2014)

The actress is really hot milf in her 50s and the sex scenes are pretty hot and plenty, also couple of doggystyle scenes (which are my favorite, because its primal) puts this on top of my list right now.  I've only been able to find a pixelated about 800mb video of this movie although it claims to be 720p, if anyone has 1080p copy willing to share I'd appreciate it and gladly swap with other movies I have)

2) webdultery (2010)

I really like the two couples who are friends engaging affairs behind their spouses back.  And it's the case for this movie, and the other spouses are clueless.  And it's not even the main female character who's going online to have affairs that's the hot one, it's her husband and their married best friend who starts affair, has nice build up, chemistry, and couple of short but good sex scenes.

3) We Don't Live Here Anymore (2004)

Just like webdultery above two sets of couple who are friends, end up fucking each other's spouse.  And Naomi Watts is just hot in this.  And her and Mark Ruffalo sneaking away to carrying on their affair is hot.  Although like most of this genre they all find out about it by the end.

4)  Affairs of State (2018)

A young politically aspiring college grad fucks two married, beautiful 60's GILF/MILFs?  Is there a sequel, please?

5) The Family Man (2000)

Although theres no actual affair, the way Nicholas Cages friend's wife (chance meeting at a bowling alley) tells him that her husband will be gone with the kids over the weekend is really hot for me.  The actress a redhead is gorgeous too.  Unfortunately he gets talked out of it by Jeremy Pivens character.  

6) Levottomat 3

Finnish people love affairs apparently.  The main character fucks everything with vagina but he also carries on an affair with a friends fiancee who has one of the nicest natural racks.  Lots of nudity in this one. The same actress plays a cheating wife who has an affair with a student in another film released in recent years, The Violinist I believe.

7) Ken Park (2002)

Maeve Quinlan and her sex scene.  Basically a "happily married" housewife let's her young daughter's boyfriend eat her out in her master bedroom.  The boy comes to the house looking for her, finds her folding laundry and asks her "can I eat you out?"  Then later they do the deed, and even later the whole family including the husband and the young man are all eating dinner together as normal as they can be, and hubby having no clue that little kid ate your wife's pussy earlier in the day.  Hot.

8) This is Where I Leave You

Jason Bateman catches his wife fucking his boss on their bed in the beginning of the movie.  Kind of like Along Came Polly, the protagonist finds their brides cheating early in the film.  I like a nice build up to the affairs but I found the wife pretty hot and although we only see glimpses of the cheating act and the bodies, the moaning and dirty talk made it hot also the fact the wife admits that it's been going on for an year.  As I stated, I hate it when the husband finds out but the sneaky aspect that the boss and wife were fucking when they believed Jason Bateman was working and the sound of their romp made this hot for me.  

9) Adulterers

As one of the posters commented, I like interracial infidelities too.  This one is hot but like almost all movies of this type she gets caught right away in the beginning.  The Affair is another hot one with a Black American GI and a White English wife back in WWII.  Le Secret is a French one that's pretty hot too.  

I'll add more when I think of more.  But I hope theres another message thread like this we can recommend a XXX cheating scene/movie that's hot.  Theres so many cheating scenarios in porn but most of them are silly and unrealistic, and I presume most visitors to this site hates it (like Brazzers where the wife gives a bj behind a counter while hubby's on the other side of it looking for her).  But there are few out there even in its comic nature can be hot and actually believable.  If theres a thread I'm willing to share some of my favorites and willing to swap files too for ones I missed.  

Cheers!