The Web offers a few online discussion and support groups for mothers of sexually abused children. Some are general mothers' websites that include groups for mothers of sexually abused children. Some will require sign-in to participate in online groups.
Daily Strength Groups - Parents whose Children have been Sexually Abused offers a group for mothers and fathers of children who have been sexually abused.
TAALK - Talk about abuse to liberate kids - offers a support group for parents of sexual abuse survivors. An email link is on the page, and you can request access to this online group.