california
Very Likely Not
California Penal Code section 647(j)(4) provides that:
(4) (A) A person who intentionally distributes the image of the intimate body part or parts of another identifiable person, or an image of the person depicted engaged in an act of sexual intercourse, sodomy, oral copulation, sexual penetration, or an image of masturbation by the person depicted or in which the person depicted participates, under circumstances in which the persons agree or understand that the image shall remain private, the person distributing the image knows or should know that distribution of the image will cause serious emotional distress, and the person depicted suffers that distress.
(B) A person intentionally distributes an image described in subparagraph (A) when that person personally distributes the image, or arranges, specifically requests, or intentionally causes another person to distribute that image.
(C) As used in this paragraph, “intimate body part” means any portion of the genitals, the anus and, in the case of a female, also includes any portion of the breasts below the top of the areola, that is either uncovered or clearly visible through clothing.
(D) It shall not be a violation of this paragraph to distribute an image described in subparagraph (A) if any of the following applies:
(i) The distribution is made in the course of reporting an unlawful activity.
(ii) The distribution is made in compliance with a subpoena or other court order for use in a legal proceeding.
(iii) The distribution is made in the course of a lawful public proceeding.
Notice that there are knowledge elements to this offense. It is only an offense IF "the persons agree or understand that the image shall remain private," and "the person distributing the image knows or should know that distribution of the image will cause serious emotional distress," and "the person depicted suffers that distress"
If the image is sent to a person who advertises that if such images are sent "all my friends will see it " it will be hard to establish that the parties (jointly) intended for the image to remain private or that the recipient should have known that the image was private.
This page from a law office discusses the law, and points out that in spite of the common name, no motive of "revenge" is needed for a conviction under this law.
This page from a legal referral service discusses this law and relates laws such as those against stalking and harassment. It emphasizes "the intent to cause fear in the other person" which does not seem presnt in the situation described in the question.