Adultery, having an affair with someone who isn't our partner, constitutes one of the all-time, hell-inducing inappropriate sexual relationships we can get our sweet selves into. Adultery spoils a relationship, period....As Loiuse De Salvo says in her book Adultery, affairs contaminate the air in a household as imperceptively but as lethally as radon. Even the dictionary agrees. To "adulterate" means to despoil, dilute, poison, pollute, debase. It feeds feelings of helplessness, hopelessness, shame, and loneliness. There is no greater challenge to a love relationship.
— Geri Larkin, Love Dharma