Quick answer
Treat threats seriously and preserve safe evidence; legal and platform remedies may both be available.
Do now
Save the threat, account identifiers, dates, and relevant URLs without redistributing images. Seek an advocate and local legal help about protection, reporting, and removal options. If a child is depicted, avoid downloading or forwarding sexual images; obtain specialist reporting guidance.
Watch for
Paying or sending more images may not end the threats. Do not threaten retaliation or publicly post identifying evidence that increases risk.
Official sources
National Domestic Violence Hotline — Plan for Safety, NY Courts — Domestic Violence / Family Offense, NJ Courts — VASPA brochure, DC Courts — Domestic Violence Division.