Ripcord by David Lindsay-Abaire

Synopsis: A sunny room on an upper floor is prime real estate in the Bristol Place Senior Living Facility, so when the cantankerous Abby is forced to share her quarters with new-arrival Marilyn, she has no choice but to get rid of the infuriatingly chipper woman by any means necessary. A seemingly harmless bet between the old women quickly escalates into a dangerous game of one-upmanship that reveals not just the tenacity of these worthy opponents, but also deeper truths that each would rather remain hidden.