A.Q.
My sone is almost 2 and coincidentally is also nick-named Monster. He started to do this same thing to me when my nephew was born about a year ago. I was baffelled at first, because I had never had to deal with that kind of behavior from his older sister. I tried removing him and talking to him, but that just didn't work. What I finally started doing was every time my Monster got rough, I'd snatch my nephew up and give him huggs and kisses and ask in a sing-song voice if he was alright. I did this in plain view of my son. After coddling my nephew for a while, I would tell my son that I was afraid that he was too rough and had hurt the baby. Then I would show him how to touch the baby gently and explained that he liked to be touched, but did not like to be hit, or grabbed, or whatever. After just a couple of encounters like that my son figured out that he did not want me holding the baby and wouldn't do anything that would make me hold him more often. They're great friends now and I haven't had much of a problem since.