A Michigan man is pleading guilty to persuading mothers to sexually assault their young children and send him the images.

Steven Demink appeared in federal court in Detroit Monday to enter his plea on six charges related to sexual exploitation of children as part of an agreement with prosecutors.

Authorities say the 41-year-old man posed as a therapist and met the women online under an alias. An indictment says he communicated with moms in New Hampshire, Idaho and Florida. Authorities say seven children were rescued and four mothers arrested.

Demink was arrested in October and faces 15 years to life in prison.