Absolutely! Human beings are driven to (feel good) about their life.
The "goal" of any cheater is to (hold onto all that is good) in their "primary relationship" while addressing their other "needs" (on the side).
They are too cowardly to make the decision to divorce or breakup with you BEFORE they start anew with someone else. Much like someone who wouldn't dream of quitting a job before they have another one "lined up".
Cheaters don't want to go through the upheaval, drama, and oftentimes expense that comes with walking away. Naturally their act of cheating could lead to the breakup they want to avoid.
The reflex or rhetorical question a betrayed person asks a cheater is "Why?" The truth is we really don't care (why)! It's not as though there is anything they could say which would cause us to say, "I can see why you did it now. Thanks for explaining it to me." The answer to "why?" is "I didn't think I would get caught."
That's the only real HONEST answer to the (why) question. The "goal" as I mentioned from the start was to (hold onto) the good in their primary relationship while addressing their other "needs" on the side. Those "needs" will vary from person to person.