Complex sentence: They meet the neighbors, the Conleys and Elstons, and soon they're having cocktails, cookouts, and hitting on each other's mates, but not without guilt and repercussions.
Split into simpler sentences: They meet the neighbors, the Conleys and Elstons, and become friends. Soon they're having cookouts together, and hitting on each other's mates, but not without guilt and repercussions.