Tween Sexual Inappropriate Behavior
My five year old daughter went over to my sister's house to play with her six year old cousin (boy); her cousin also has a big brother (11). Upon returning home my daughter told me that her big cousin had "touched her in her privates." She said she was playing in his room and he placed his hand below her underwear and touched her; she told him not to do that because it hurt (she also happened to have a yeast infection which made her more sensitive), at which point he stopped. Her cousin then asked her not to tell anyone.
My questions are as follows: my daughter is probably too young to have fully understood what happened. I thanked her for confiding on me and assured her that telling me about the incident was the right thing to do. I want to avoid discussing this matter any further so as to not permanently scare her/create a long lasting memory, though I've continued to reassure her that her cousin's behavior was inappropriate and that she should always talk reach out to me if anyone ever touches her in her privates. Is this the right way I should handle this matter with her (she just turned five)??
The second issue is related to my nephew. I need to protect my daughter (and others) from this ever happening again. I am considering speaking to him today (this happened less than 24 hrs ago), telling him how his behavior was inappropriate, and scare him about consequences should there ever be a re-offense. I don't want to traumatize him for life, but he needs to be spoken to in a direct, serious manner. I know he is a good boy that just made a dumb mistake (was not thinking straight), so I want to help him understand the gravity of his actions so that he doesn't EVER do this again to anyone? Is this the right approach??