After the accident everyone is trying to cope with the fact that Riley's dead. But Kate is not yet able to let him go. Once again she was on the verge of enjoying happiness, before real life stood in her way.
Riley's death is probably the greatest tragedy that befell Kate. She's the only one who doesn't stop looking for him. But suddenly, she realizes he won't come back. In my opinion she does that all too soon. After losing not only a friend but a loved one, the giving up on him in the blink of an eye seems unrealistic and unnatural.
Another unsatisfying thing in this episode is how Ingrid's personal problem is being introduced. I suppose the intention of this was to create even more tension and drama. The idea was great, the execution however disappointing.
The writers should have focused on the other drama storyline. The one that kept the fans of McLeod's Daughters longing for the continuation during a time when Nine Networks kept announcing the return of Drama Wednesday.