Rose McGowan, one of the leading voices of the #MeToo movement, said Monday that her partner had exchanged text messages with the actress and director Asia Argento in which Ms. Argento said that she had indeed slept with the actor Jimmy Bennett — an act that Ms. Argento recently denied.

In a lengthy statement, Ms. McGowan also said that her partner — the model Rain Dove — told her that in text messages, Ms. Argento had said that she had been receiving unsolicited nude photos of Mr. Bennett since the time he was 12 years old and had not informed the authorities or told him to stop sending the photos.

A spokeswoman for Rain Dove confirmed in an email that everything Ms. McGowan said in her statement was factual.

In the statement of more than 1,000 words, Ms. McGowan took pains to both explain why she had grown close to Ms. Argento as well as suggest that she had more recently distanced herself after allegations emerged that Ms. Argento sexually assaulted Mr. Bennett when he was 17.