Fidelity in relationships is the commitment to remain faithful and devoted to one another. It is the foundation of trust, respect, and love that allows couples to build a strong and lasting bond. This commitment involves being honest, loyal, and supportive of each other, and making
From Wikipedia
Fidelity is the quality of faithfulness or loyalty. Its original meaning regarded duty in a broader sense than the related concept of fealty. Both derive from the Latin word fidēlis, meaning "faithful or loyal". In the City of London financial markets it has traditionally been used in the sense encompassed in the motto "my word is my bond".