*grunch*

I think the slowplay is ok because it meets most/all of the conditions of correct slowplay:

1) You have a very strong hand
2) It's a small pot
3) The player directly on your right bet

A set on the flop (even bottom set) is monsterish - it is good multi-way, there is no need to knock out opponents. Obivously the AA on the board devalues the set a little.

If this were checked to us I would bet it vice checking though - no need to miss bets. Same goes if the pot were bigger. But, since others are willing to do our betting for us and there is no way we are going to knock out someone holding an A anyway, wait for the turn.

p.s. Having to go all-in is very bad on this hand.