NL100 (PS): AQ villain overbets turn

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Poker Stars - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker HH Converter)

Hero (SB): $99.00
BB: $100.00
UTG: $111.95
MP: $47.60
CO: $97.70
BTN: $343.95

Reads: <font color="blue">39/11/1.7 Seen villain make plays against me before. Likes to float me.
Villains AF worries me. Are overbets like this often bluffs?</font>

Preflop: Hero is dealt Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/heart.gif[/img] (6 Players)
2 folds, CO calls $1.00, BTN folds, <font color="red">Hero raises to $5.00</font>, BB folds, CO calls $4.00

Flop: ($11) Q[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $8.00</font>, <font color="red">CO raises to $16.00</font>, Hero calls $8.00

Turn: ($43) J[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets all-in for $76.70</font>, hero?