Besides supplementing her income with boarders, Luisa engages in swindles with underworld contracts, and is not above cheating her partners by skimming money off her illicit earnings. Instantly smitten by Paco, the attractive Luisa quickly seduces her new tenant. Frustrated by his unfruitful job hunt and by Trini's refusal to sleep with him until they are married, Paco offers little resistance when Luisa seduces him, initiating an affair. He is dazzled with the sexual delight to which she introduces him. So intense is Paco's attraction for Luisa, that he abandons Trini for long periods, finally showing up at the major's house to spend Christmas Eve with her. Trini feels a distance between herself and Paco, and while the couple are strolling in the street, she is surprised to see the 'old widow' and immediately guesses that she and Paco are having a relationship.