As much as Kyle hated to admit it, the infidelity had been for the best. Though some may not think so or feel that the wrong would never make a right.
It wasn't that he was justifying the means, but rather, the outcome had been for the best. From it, he had learned to focus on what had to be done.
As Kylie, she had been wallowing in self-pity, depreciating thoughts about herself and had been slowly spiraling down the path that was perhaps, not too good.
However, upon knowing that some person had found her desirable did a lot for her self esteem. She had even tried to be braver and try to communicate with her husband, but he still shut her out.
Despite that, instead of questioning herself like she used to do, she had focused on her children instead.
Whether that was better for her marriage, Kyle wouldn't know. Not even now. But it did save him from going into depression, and he was forever grateful to Chris for it.