So we just moved back to our home state, and currently living with my husband's family for a few months tell our place is ready, we have a 4 year old son and he has a cousin who has been coming over to play with him after school (she is 6) and everytime she comes over I'm stuck watching her alone with my son, and i have noticed some weird behavior from her, she is a very good polite child, so I'm very concerned. She has been taken my son into another bedroom and locking door and being super quiet. I ask if I can come play with them and she says no just to stay in other room and she will take care of my son. It was weird. Then I noticed my son touching his private area after they left the room. My son has a bad speech delay and can't talk well. He said hump tho after she left. So I'm kinda worried she is touching him. Idk I have that feeling. I have not seen it but she doesn't wanna stay in the same room as me when she comes to play with him even when the room they are in has absolutely no toys or anything to do..Im so scared to check though. Cuz my husband's family will NOT believe me cuz she is the perfect little child in their eyes. Idk I think something weird is going on. What do you think? Is this normal play?