easy value bet on the end or check to induce bluff? 30 bellagio

incredibly good loose passive 30 at bellagio thurs. night.

4 limps. i call in sb with 99. 6 to the flop

flop: AA4 with 2 spade.

I check EP player bets, button(the only other aggressive player at the table who plays moderately well though tends to spew at time on the turn) raises, I 3-bet and get heads up.

Turn: offsuit 7.

I bet, call.

River: offsuit 6.

easy value bet or check to induce a bluff?