You're No Saint Either

Lilly Bell, a property saleswoman, is presenting a home to a hitched pair, Tommy Pistol and Mona Azar. Tommy and Mona appear content with the residence's spaciousness and the exquisite windows. Concurrently, Lilly is subtly checking Tommy out, unmistakably finding him appealing.
Tommy begins to return the favor, but then attempts to dispel his attraction towards Lilly before Mona becomes aware. As Lilly escorts them to one of the sleeping quarters and its adjoining restroom, Mona comments that the bathroom is somewhat cramped. Lilly persuades her to descend to the ground floor to inspect the larger bathroom located there.
Once Lilly finds herself alone with Tommy, she makes advances towards him. Tommy is taken aback, and although he offers mild resistance, Lilly has him under her control, extracting his wedding band. They commence with kissing and caressing, until Tommy regains his composure and requests his wedding band back.
Shortly thereafter, Tommy reunites with Mona. Lilly concocts another scheme, proposing they check out an even more luxurious bedroom, equipped with an attached bathroom. However, when Mona ventures into the bathroom, Lilly confines her within the water closet, allowing Lilly and Tommy to have privacy once more.
Mona voices her inability to exit, but Lilly feigns that the door is jammed, reassuring her they'll find a solution to unlock it. Her actual intent, though, is to entice Tommy behind Mona's back. Tommy succumbs to the temptation this time and allows Lilly to extract his manhood and perform oral sex.
As Lilly is engaged in this, Mona pounds on the door and Tommy distracts her with casual reassurances, aiming to stall for time. Eventually, Tommy becomes too unnerved and instructs Lilly to release Mona. Despite Mona's evident dissatisfaction with the door situation, she remains oblivious to Tommy and Lilly's infidelity.
Lilly then introduces them to an elevator and persuades Mona to test it out, but traps Mona inside and informs her this door is also jammed. Tommy and Lilly then deceive Mona, pledging they'll search for a toolkit, but instead retreat to the living room to engage in sexual intercourse. They experience vigorous, passionate sex - nearly forgetting that Mona is solitary and awaiting release from her confinement.