I worked in a daycare situation one summer when I was in my teens (daycare for the children of teachers at the local community pool) and we had a Sam in our midst.
Basically, little AJ's mother thought the sun rose and set on her precious son and thus no limits must be placed upon his behavior/talents. Alas, at the tender age of two, the kid was a confirmed bully. I hate to say it, but there it is. He was also gigantic for his age. He towered over some of the three year olds.
One of AJ's favorite tricks was to push a smaller child down when nobody was looking, then sit down in the dirt and start crying. Then when someone asked what happened, he'd tell us the smaller child had attacked him. Well, this didn't sit too well with me even at sixteen. I smelled a big ol' stinky rat, and I called AJ on it. He was amazed. Nobody had ever told him no before, or flat-out told him to stop lying.
The result? AJ adored me and followed me around like a puppy the rest of the session. The kid was desperate for limits and I was the only person who had ever successfully given him any! It's quite possible Sam is just as desperate for some limits.