Inclusion Criteria:  Women who are between week 28 of their pregnancy and 10 weeks postpartum and are receiving care at a UCLA OB-GYN clinic Fluent in English Current endorsement of moderate or higher depression on the Edinburgh Postnatal Depression Scale (EPDS, => 11 sum score), administered by the treating OB-GYN physician or study staff Not currently in individual treatment for a behavioral or emotional problem (e.g., anxiety, depression) Willingness to follow study procedures Willingness to participate in treatment through the study and follow all study procedures, including provide HIPAA Authorization for research Has access to the internet via mobile or desktop device  Exclusion Criteria:  Are currently receiving treatment by a therapist or a psychiatrist Unstable suicidality (e.g., 2 or more suicide attempts or self-injurious behaviors resulting in hospitalization in the last 6 months, combined with high ratings on self-reported negative urgency) Current substance use disorder that interferes with treatment: specifically, patients meeting diagnostic criteria for Substance Use Disorder (SUD) will be eligible for inclusion only if they are able to attend sessions while not under the influence of that substance, with the exception of individuals abusing opiates or freebase cocaine, who will be excluded Principal diagnosis of psychosis unrelated to depression (unipolar or bipolar) Neurological conditions Severe uncontrolled medical conditions (e.g., anorexia nervosa, cardiac conditions requiring continuous monitoring) Cognitive impairment (e.g., developmental disability, dementia)