If both people involved are married then both people are cheating and both are wrecking their respective homes.
If a married man chooses to have sex with someone outside of his marriage, he is at fault, not the third party. I don’t care how pushy the third party is. That’s a bullshit excuse. He always has a choice to break his marriage vows or to say no to the advances.
A cheating spouse is not a victim. They’re an asshole.