TPWK runs into river value bet question...

Hi all, I have lurked around this forum for a while, and after just becoming casino legal, went out to play real live poker for the first time. Playing at a very loose 2/5 full kill pot game, which makes almost every hand (including this one) 5/10. Villain is extremely LPP (in 50% of hands) like the rest of my opponents but seems to recognize that I'm a tight player after unusually folding a couple hands to me instead of calling to the river like he does with everyone else.

Preflop: Hero is on the button with A [img]/images/graemlins/diamond.gif[/img] 6 [img]/images/graemlins/diamond.gif[/img]
UTG folds, UTG+1 calls, Villain calls, MP1 calls, 1 fold, CO calls, Hero calls, SB completes, BB checks.

Flop (7 SB): A [img]/images/graemlins/spade.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/diamond.gif[/img]
SB checks, BB checks, UTG+1 checks, Villain bets, 2 folds, Hero raises, 2 folds, Villain 3-bets, Hero calls.

Turn (6.5 BB): 8 [img]/images/graemlins/club.gif[/img]
Villain checks, Hero checks

River (6.5 BB): T [img]/images/graemlins/spade.gif[/img]
Villain checks, Hero ?

After villain 3-bets the flop but checks both turn and river, does a river bet cause him to fold or call with a worse hand often enough?

Thanks in advance for answering what might be a simple quetsion for y'all...