Jan Dara (2001)
A stepson rubs some ice on his stepfather’s mistress’ back because of the heat. Well, things get heated up more instead, and it leads to them having sex.
romance
A Brighter Summer Day
1991A boy experiences first love, friendships and injustices growing up in 1960s Taiwan.
The Passion of Ayn Rand (1999)
Ayn Rand cuckolds her husband and asks permission from him to take a young lover.
A Summer in Portugal (2013) Ein Sommer in Portugal – Germany
A husband asks a friend to serve as tour guide for his wife in Portugal. He does so, and also bangs her in the process.
A Night in Heaven (1983)
A teacher wife starts an affair with her student when she goes to a strip bar where he performs and makes out with him in front of everybody.
Drinking Buddies (2013) – Olivia Wilde, Anna Kendrick
Two couples – Luke and Jill & Chris and Kate – go out of town for the weekend. Chris and Jill kiss while on a trail hike while Kate strips in front of Luke and invites him to go swimming with her.
Notes on a Scandal (2006) – Cate Blanchett
A married teacher starts an affair with her 15-yr old student. Her old, lesbian co-teacher who has the hots for her catches her giving the kid a blowjob.
5×2 (2004)
A newlywed wife cheats on her husband on the night of their wedding.
Shared Wives (2012)
Two couples – Will and Mindy & Gabe and Karla – plan to have a foursome. But Mindy and Gabe decide to go ahead first without telling their spouses, which complicates things. From New Sensations
Girl Next Door (2000) aka Tonari no Onee-san
Masahiko’s lady boss, whose husband is out of town, stalks virgin boys in the park at night.