Tough one John. My last GF's daughter was quite the energetic terror and one of the reasons for me ending our relationship was how my kids (especially S9) felt about her. And I blame the mom for much of it because she did not have strong consequences for her daughter when she misbehaved. But I also felt sorry because the father had ditched them several years earlier.
If I had an older boy say something like that to my daughter, I would have a well thought out man to boy talk.
