too passive?

BB in this instance is very loose and very bad post-flop too.

Hero is on the button with A-Q. 3 limpers, hero raises, BB calls and limpers call (10SB’s)

Flop: 5,5,6 rainbow. All check, hero checks?
Turn: Q. BB bets, all fold, hero calls
River 10. BB bets, hero calls

Reasons for not raising turn or river:

· He could easily have a 5 that he wanted to check-raise the flop with (cos he likes check-raising as a rule) and I don’t want to be 3 bet here
· If he’s bluffing I don’t want to scare him off (turn)