ADULTERY: is it?

Acceptable?

Wrong to assume [BOTH] parties, will do the same to each other?

Wrong to DISTRUST one another, despite the fact that: the one who is married, IS the only one cheating. Him/Her lover remains loyal, yet is not given even the slightest bit of trust. Even outright, accusations of fornication ELSEWHERE! Is it wrong to doubt the others intentions and/or be skeptical about any and all "claims" of LOVE being present?
ADULTERY: is it?
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