What are the motifs in The Best American Short Stories of the Century by Katrina Kenison?

The impact of relationships is a recurring idea. There are many different types of relationships that are looked over the course of the books. Some of the relationships are seemingly typical and involve interaction that an average person can relate to in terms of family, marriage, and so on. Often these prove to be much more complex than they first appear when they are looked at more closely. Many times in the stories there will be an adulterous relationship going on in the marriage, and in some cases such as "Gesturing" even the adulterous affairs become more complex when the husband and wives continue to see each other despite the fact that they are no longer together.