Infidelity, or cheating, is the act of being either emotionally or physically unfaithful to a spouse or partner, and breaking a commitment or promise during the act. Adultery is engaging in physical, sexual activity, and may be considered a criminal offense and grounds for divorce in certain places.

Researchers say knowing other people are unfaithful can make you unfaithful, too. Many things can lead to infidelity—a lapse in judgment, one too many drinks, a long time coming. But researchers from one study say that it could be something that rubs off on you.

Recovering from an affair can be one of the most challenging times in a marriage. This challenge may come with mixed feelings and uncertainty. But as spouses rebuild trust, take responsibility for their actions, resolve conflict and forgive, the process may deepen and strengthen love and affection.

One of the most common long-term effects of cheating is the erosion of trust in the relationship. The partner who was cheated on may find it difficult to trust their partner again, understandably so. This lack of trust can cause ongoing problems in the relationship, even if the cheating partner is truly remorseful.