The bully

I have yet to figure out exactly what to say to another parent after my own child hurts their kid. After all, she's, three, and I'm pretty sure she'll grow out of it--or at least I think she will. Otherwise I'm raising the world's first female bouncer. Like, isn't "Hey, I'm sorry Alaina pushed Gavin off a bridge" or  "Myles may have a bruise because Alaina strangled him with the curtain sash today" a bit inadequate? (Yes, both of these things really happened.)
The girl can be ruthless. She will search out a weak spot and destroy--and she likes to practice on her brother. (At least this way I don't have to apologize to anyone, right?) Jesse  got stitches after he sliced his nose open when he fell and hit our tv stand. So naturally, now when Jesse annoys Alaina, she pokes him IN THE NOSE. What's a mom to do! I feel so conflicted, because if I'm too lenient she may start torturing animals and then become a serial killer. Too harsh and I may crush that bright and spunky spirit that I love so much. No pressure.