I completely agree. People don't usually read comments left on comments, but just to err on the safe side...
I thought the way that Luke walked out on Kamryn was far worse than Nate's one time with Adele. As awful as Nate's betrayal was, we were given reasons for his actions -- he knew that Kamryn had a crush on someone else, just as he was about to back away Adele looked insecure in a way that Kamryn sometimes does, it was only the once.
However, Luke walked out on Kamryn, left the country and MARRIED SOMEONE ELSE. In fact, he returned married. I can understand that Kamryn would still have feelings for Luke, especially given how he kept in regular touch with Tegan, but to just accept him back -- after 14 months and a wedding band -- without any significant misgivings struck me as completely unrealistic.
How could she possibly trust him not to do that again? Not a HEA in my opinion, not by a long shot, yet clearly that's what the writer was aiming for.