Inclusion Criteria:  Recent loss of romantic partner within the past 5-7 months At least 18 years of age Minimum score of 25 on the Inventory for Complicated Grief Must be able to speak, read, and write in English Must be eligible to safely complete MRI scanning  Exclusion Criteria:  Death of a second close family member/friend in the past year Currently receiving psychotherapy Diagnosed with obstructive pulmonary and/or heart disease, diabetes, liver failure, or kidney failure Significant visual, auditory, or cognitive impairment Divorced within the last year Prior participation in a similar emotion regulation training protocol in Dr. Denny's lab Any contraindication of MRI scanning (e.g., pregnancy, presence of any non-removable metal on or in the body, implanted medical devices, tattoos, medication patches, orthodontic braces or permanent retainers, hearing aids, history of claustrophobia or breathing disorders)