Do you realise you're using the word "cheater"? Having multiple relationships, known to all parties is subjectively wrong and we can argue about it as much as

Do you realise you're using the word "cheater"? Having multiple relationships, known to all parties is subjectively wrong and we can argue about it as much as we want. Agreeing to a monogamistic relationship and secretly breaking that agreement, as implied by your use of the word "cheater", is objectively wrong.