Teitelboim's second marriage, at the age of 51, was to Eliana Farías. Together, while in exile in Moscow following the Chilean military coup d'état of September 11, 1973, they raised Faría's son, Roberto Nordenflycht, and their own daughter, whom they named Marina. Roberto followed Teitlboim's example and also became a communist. He was killed in August 1989 while taking part in a guerrilla action in Chile with the Manuel Rodriguez Patriotic Front. The grief over Roberto's death marked the end of Teitelboim's marriage to Farías. Marina, for her part, eventually became a career diplomat.