Is the person that they cheated with just as guilty as the cheater?

If the person is aware of the person they are with is cheating on someone, I believe such things speak on someone's character, even if the other individual is single, I think it's just still disrespectful, cold and selfish for a single person to target a taken person and I believe it shows a major dent in someone's morals. 🤔
Is the person that they cheated with just as guilty as the cheater?
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