Anything posted online to the public is open to that risk. She took the implied risk when she posted the images for the public to see. There is no copyright on social network material so there would be no infringement laws broken, and I believe the network privacy policy should state that users...
contact a lawyer immediately..... your son might be in danger in the house with the mold, and if he already has issues you most likely have already allowed the mold spores to cause infection. See your doctor, tell him about the mold, contact a lawyer, the lawyer will make them have a mold...