Extramarital relations are an act of cheating on one's partner and are considered inappropriate by society. Antonyms for extramarital relations can be love, fidelity, and faithfulness. These words indicate devotion and loyalty to one's partner, and a mutual commitment to a relationship. By choosing to uphold these values, couples can build a strong bond and trust in their relationships, and avoid the negative consequences associated with extramarital relations. Infidelity and betrayal can cause heartbreak, emotional stress, and damage the trust and respect between partners. Therefore, it is crucial for couples to focus on maintaining strong relationships based on love, fidelity, and faithfulness to one another.