My ADHD nephew (who also has other diagnosed issues as well) recently showed my 8 yr. old video on his camera of his Mother's (my sister in law) naked 'booty'. I did not see the video myself but only just heard him showing my son the video.....saying he was going to 'blackmail' his mother....he thought it was hilarious....my son was not amused (he didn't laugh or even crack a smile.) At the time, I figured it was something stupid....her picking her nose, or making a funny face or something....idk....anyway later, I heard the nephew say something about his Mommy's booby.....come to find out later it was booty.....on the same camera, this boy was sharing video with me which he covered up at one point and said he had exposed himself. I've also heard from a 3rd party within the family that my sister in law had confided in, that this nephew had put his hand down her pants and was feeling around one night when they were cosleeping........I find all of this to be concerning.....my son was embarrased and got very emotional/cried when we asked him gently about the video and if there was anything else we should know.....what should we do/how should we handle this?