What the Brides Do (2011)

The couple, Mariam (Marta Hazas) and Ale (Juan Caballero), are going to try an old sexual fantasy to solve their sexual problems: making a threesome with a stranger. An unknown person, Él (Sergio Mur) is the key piece of an erotic triangle where nothing goes as planned. Erotic drama, a story where feelings and sex mingle to form a web of emotions where not everything is what it seems.

Unfortunately the movie What the Brides Do is not yet available on HBO Max.