What are your recommendations for books where an MC cheats on an MC, and you believe in and root for the HEA?

I usually eschew all MC on MC cheating books - to me, that's it for the relationship. I'm reading a book right now where there's infidelity on one side within a marriage (The Scarlet Thread by Francine Rivers), and I'm just ready to can it because I can't think of one novel where cheating leads to a better relationship and a good read. Can you think of a book where an MC cheats, and it's still a genuine HEA?