When it comes to married couples or people in a dedicated intimate relationship, there are (essentially) two ways to describe one person in the relationship being intimate with someone other than their spouse/significant other.

If it's without their partner's consent or knowledge, it's Cheating or Infidelity.
If it's with their partner's knowledge and consent, that's an open marriage or (in some cases) cuckoldry.

But, is there a word, term or phrase that can be applied to both of these scenarios? Something that describes straying from one's 'commitment', but does not imply unfaithfulness or maliciousness?

EDIT: Finish this sentence-

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> Michael cheated on his wife. Ben was intimate with another woman because he is in an open marriage with his wife. Both are \_\_\_\_\_\_\_\_\_.
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