Oh, sibling rivalry. I’ve seen it up close. Fortunately, as the only daughter and a middle child…my role was the peacemaker and I didn’t have anyone to compete with (or wasn’t interested). But I did have a front row seat. It was sometimes entertaining, funny, and at times…upsetting. Where does it come from? I’m pretty sure the seeds are planted early. Kate is a nearing-middle-age career woman starved for love and dealing with the guilt over her role in the death of her brother-in-law.