Does past treatment for depression create resilience to future shocks? We study a randomized CBT-based intervention for prenatally depressed mothers in Pakistan and exploit variation in COVID-19 restriction stringency six years after childbirth. Treated women were protected against restriction-induced anxiety, depression, comorbidity, and functional impairment. Protection extended to spousal relationships, offsetting restriction-driven declines in relationship quality and increases in marital conflict. This resilience operates through psychological channels: the intervention builds locus of control and self-efficacy, strengthens family and partner support, and reduces how overwhelmed women feel when shocks arrive. The resulting psychological capital has returns well beyond the treated condition.