Hero is CO with AQo with 7.20 stack.
Villain is on the BTN with 8.20 stack
Folds to hero who opens to 0.15
villain 3bets to 0.52, folds back to hero who calls

Pot: 1.11
Flop: 5c 7h 9s

Hero checks
Villain bets 0.55
Hero calls

Pot: 2.21
Turn: Jc
Hero checks
Villain checks
Now the reason I thought about bluffing the river is because villain isn't slowing down with sets here, AJ is probably betting this turn a second time, and all overs QQ,KK,AA, and JJ are betting this as well. I think the only hand that would slow down that V would be 1010, and 88 which I don't think is 3b in the first place.

Pot: 2.21
River: 9h

Hero bets 1.50, I normally size to about 2/3, but since we were deeper I went a little over what my standard sizing is. The reason for making this is after I bluffed, I really didn't know what hand I was representing. I just bluffed because I thought villain was folding to most rivers. I think I sometimes show up with 10Qs, A9s, 77, 99, JJ, but never QQ+. Thoughts on this line?