Value bet against possible tripps?

Villian did sat down maybe five hands ago so no reads. Just the fact that he didnt have more then 15BB when he first sat down. At this time he had 19.5$.

2/4$ 6-Handed
Dealt to Hero AA

Hero Raises, 4 Fold, Villian Calls in BB

*** FLOP ***(4.5 SB) [2c Qs Qh]
Villian Checks, Hero Checks
Not much to talk about?

*** TURN ***(2.25 BB) [2c Qs Qh] [6s]
Villian Checks, Hero Bets, Villian Calls
Hmm, no bet. Now i think its much more probable that he will call down.

*** RIVER ***(4.25 BB) [2c Qs Qh 6s] [Jd]
Villian Bets, Hero??
Now what?