25NL TPTK getting c/red by big stack on the turn

[Genz]

Villain is running 21/9/6 over something like 60 hands. He is talking in the chat to a 2p2er all the time about how badly beaten they got all the time. So he probably thinks he is a good player. I have no specific notes on him though. How do you play this turn? check behind to behin with? Will AJ, AQ call us here?

Poker Stars - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $9.00
BB: $125.85
<font color="black">Hero (UTG): $31.10</font>
CO: $25.00
BTN: $28.75

<font color="black">Preflop:</font> Hero is dealt A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img] (5 Players)
<font color="red">Hero raises to $1.00</font>, 3 folds, BB calls $0.75

<font color="black">Flop:</font> ($2.10) Q[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img] 5[img]/images/graemlins/club.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $2.00</font>, BB calls $2.00

<font color="black">Turn:</font> ($6.10) K[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $4.00</font>, <font color="red">BB raises to $9.00</font>, Hero ???