The Roommate by Jen Silverman

Sharon, in her mid-fifties, is recently divorced and needs a roommate to share her Iowa home. Robyn, also in her mid-fifties, needs a place to hide and a chance to start over. But as Sharon begins to uncover Robyn’s secrets, they encourage her own deep-seated desire to transform her life completely. A dark comedy about what it takes to re-route your life – and what happens when the wheels come off.