Dust and Obey by Christy Barritt
I liked seeing Gabby and Riley working together and working on working out things out. They find themselves helping out a friend at a marriage retreat for couples and soon find themselves more deeply involved than they planned. Also as they act as a couple, they find themselves figuring out why they are no longer a couple. Also while gone they get a call from Sierra and Chad about the baby. I really enjoy this series of books and find myself reading them in one session. I can't wait to see what is in store next.