Inclusion Criteria:  A biological, adoptive, or step-parent from across the United States who lost a child diagnosed with cancer Age 18 or older Experienced the loss of a child to cancer at least 6 months prior to enrollment Elevated prolonged grief (PG) symptoms (PG-13-R scores of 30 or above) (N/A for training case participants) Resides in a state in which a study clinical supervisor is licensed to permit telepsychology practice or otherwise able to comply with current telehealth regulations English-speaking as per the language assessment items below and willing to receive the intervention in English.  What is the participant's preferred language?  °(Specify Lang)___________________________  How well does the participant speak English?  Very well (PARTICIPANT IS ELIGIBLE) Well (PARTICIPANT is NOT ELIGIBLE) Not well (PARTICIPANT is NOT ELIGIBLE) Not at all (PARTICIPANT is NOT ELIGIBLE)  Support Provider Inclusion Criteria:  Must be age 18 or over as indicated by self-report Has been identified by the bereaved parent participant as a support or someone important to bereaved parent Resides in a state in which a study clinical supervisor is licensed to permit telepsychology practice or otherwise able to comply with current telehealth regulations  Exclusion Criteria:  Inability to access a functional device for videoconferencing and declines offer to use a study loaner device.  Support Provider Exclusion Criteria:  Significant psychiatric disturbance sufficient, in the investigator's judgment, to preclude completion of the informed consent Inability to access a computer with Internet or inability to use a computer with Internet provided by the study as indicated by self-report