I would kill anyone that ever did that to my child. There is no justification for it and for you LO's safety you need to tell him to get the smurf out. Please get LO away!!! That is a dangerous situation.
Leave now. Like right now. Get off the computer, grab your poor baby and leave. Go to a relative, friends, shelter, hospital, anywhere. Contact her pedi or smurf, any doctor, and get her looked at. If there's anything, call the police.
Maybe it was something innocent. But I would not risk it at all. Your child is not worth the risk and I would try to justify nothing until you know.