AQs UTG river TP; too thin?

villain is 16/8 over 25 called down 3 streets with QQ on 22JccJ5c board vs me same positions. topped up some but not full.
do you bet turn?
is this river to thin? I didnt think he'd be able to let go of a pair and I don't think he has a bluff in him. obviously im only surmising from what ive seen and our little bit of history. Not really reads just intuition.

$0.10/$0.25 No Limit Holdem
PokerStars
9 Players
Hand Conversion Powered by weaktight.com

Stacks:
kick (UTG) ($40.43)
UTG+1 ($11.91)
MP1 ($12.35)
MP2 ($18.78)
MP3 ($9.41)
CO ($25)
BTN ($9.65)
SB ($10.58)
BB ($25.69)

Pre-Flop: ($0.35, 9 players) kick is UTG
kick raises to $0.75, 2 folds, MP2 calls $0.75, 4 folds, BB calls $0.50

Flop: ($2.35, 3 players)
BB checks, kick bets $1.75, MP2 calls $1.75, BB folds

Turn: ($5.85, 2 players)
kick checks, MP2 checks

River: ($5.85, 2 players)
kick bets $3.25, MP2 goes all-in $16.28, kick folds