My son's behavior has changed recently. When I was doing housework, he would suddenly hug me from behind, or peek into the bath... One day, there was white fluid on the crotch of my underwear. The other day, he said, "I'll give you a shoulder massage," and when he gave me one, he touched me other than my shoulders in a naughty way. I never thought my son would do something like that, but I never expected him to do that right next to my husband...