casino 1-2 NL TPGK hand in multiway pot

there were mixed LAAG, TAG and fish at the 1-2nl table i played last night.
UTG(loose semi-passive) raised to $10, i had :Ac: :Qc: called, MP2 called button called and big blinds (loose passive) called.
the stacks:
UTG: $212
hero: $450
big blind: $400
the flop($52) came like:
:Ah: :3c: :4s:
big blind checked, UTG checked, i bet $40, button folded but big blind called, UTG folded.
turn came :9d:
big blind checked, i checked behind with the intention of controlling the size of pot(was s this the best play?)
the river : :7s:
the big blind bet $50, hero????

do you guys bet or check on the turn in this situation?

side note: big blind was a very loose guy who played lots of trash, called down with flush or OPESD and piled up lots of chips with lucky hit.

i think checking is fine. please tell me you didn't fold the river.

dude this is a casino game you basically have the nuts....bet turn and river and rake in a huge profit. You sacrificed a ton of big bets by checking flop and please tell me you did not fold river.

i didn't check on the flop but wanted to make the pot relatively small though in later streets with just one pair hand. As played, i called his river bet and lost to his straight( he had 56). :cry:
regardless of the result, the only thing i'm concerned about is whether i should value bet on the turn or just check behind to control the size of the pot ( the pot would be huge on the turn if i made around $60 bet on the turn).Do you guys really have confidence in your one pair hand in big pots?
after reading NO limit theory and practice, i just wanted to apply the concept of pot control to these casino live games.