When he tells her the truth, Diana reveals that she already knew it having recently consulted a gynecologist who told her that she can conceive.
Unfulfilled in her desire to have a child, Diana begins to pay attention to Juan, an attractive gas station attendant.
Juan is a working class man who has been saving money to move to a comfortable apartment with his girlfriend, Charo.
When Marcos travels on a business trip abroad, Eduardo invites Diana to go to a night club, where they coincide with Juan and his girlfriend Charo.
Charo works as a secretary in a travel agency, her boss Baena lust after her, but she puts him in place.
She comes clean with Juan telling him that she is in fact married and that she is carrying his baby, but breaks their relationship.
Men sent by Marcos give Juan a good beating to make clear to him that he has to forget the past.
Diana, coming out from her depression, set her eyes on a new man, a young athlete who has just won a swimming contest.
Simón Andreu, who was Eloy de la Iglesia's favorite actor in this period of his career and starred in many of his films, has the role of the wealthy husband.
Andión, a singer and actor, was also in charge of the music, singing the opening and closing songs of the film.
Patxi Andión and Amparo Muñoz met while making this film and became a real life couple.
La otra alcoba is a typical film of the period known is Spain as el destape.