Wife swapping with a steamy partner

A man discovers a steamy partner for his wife through a friend, and the couple decides to indulge in a wife swapping arrangement. The wife is initially hesitant, but her husband reassures her that it's just a harmless fantasy. The friend, who has a similar interest, is eager to satisfy both the wife and her husband. The wife, intrigued by the idea, agrees to the exchange. The friend, a skilled lover, takes the wife to the heights of pleasure, leaving her thoroughly satisfied. Meanwhile, the husband, left alone, reflects on the experience, realizing that his wife's satisfaction is all that matters to him. The friend, satisfied with the outcome, leaves the couple to their own devices, knowing that they will continue to explore their desires together.