50NL - QQ overpair on turn

[emKay]

Villain just sat down and was an unknown at that time.


PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($16.70)
CO ($51.25)
Hero ($49.30)
SB ($58.90)
BB ($34.30)
UTG ($48.35)

Preflop: Hero is Button with Q[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises to $1.5</font>, <font color="#CC3333">Hero raises to $5</font>, <font color="#666666">2 folds</font>, CO calls $3.50.

Flop: ($10.75) T[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
CO checks, <font color="#CC3333">Hero bets $7.5</font>, CO calls $7.50.

Turn: ($25.75) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
CO checks, Hero checks/bets how much? How is he responding to a shove then?