I was the same, very strict with my views and morals (both towards my own and others actions) but now I see more nuances and can even understand some people who do cheat.
I think the older you are and the longer a relationship is, it really comes down to choosing to do the right thing even though you might have urges to act otherwise.
Isn't that strange... you'd think the older one gets, the firmer ones views would become. Instead, children seem to have the firm convictions, while older folk get all the nuance :)
Definitely. And to live with the consequences of your choice.