Elizabeth Olsen and Meghann Fahy deliver two of the most nuanced performances of the Emmy season, both playing complicated women who are wives and mothers. In “Love & Death,” Olsen’s Candy Montgomery is based on a real housewife in late-1970s Texas, who out of boredom instigates an affair with Allan (Jesse Plemons), a member of her church — an illicit assignation that eventually leads to Candy being on trial for murdering Allan’s wife, Betty (Lily Rabe). In a very different setting, Season 2 of Mike White’s “The White Lotus,” Fahy plays Daphne, a character on a luxury Sicilian vacation with her husband, Cameron (Theo James), and another couple: Ethan (Will Sharpe) and Harper (Aubrey Plaza). As the tension among the four escalates, it’s both sexual and violent — and oddsmakers were entirely wrong about the identity of the dead body in the season-premiere flashback.