Single Sundays: Strangely Normal by Tess Oliver
Synopsis (from Goodreads.com): A unique summer job lands eighteen-year-old Eden Saxon into a lifestyle completely different than her own. She becomes a companion for nineteen-year-old Finley King, the daughter of a rock legend. Finley suffers from severe anxiety, and her father fears her being alone. Eden leaves her loving, but wildly dysfunctional, parents and dreary …