Petty Woman - S10.E7

Murphy's archrival, Athena Gillington, invites her to one of her parties. Murphy doesn't want to go because she thinks it is a pity invitation. Murphy relents and attends the party where she discovers two things about Athena, one that she is using Murphy's presence at the party as publicity for her I just turned 50 book and two, that Athena is much older than 50.