TPGK in rr'ed pot facing weird line

[Djeorge]

This was my third hand at the table. Villain turned out to be a 50/30 in the end but that's irrelevant to the post I guess.

I didn't really have a clue of his hand on the turn. Any ideas?

Poker Room skin
No Limit Holdem Ring game
Blinds: $0.50/$1
5 players
Converter

Stack sizes:
UTG: $64.05
CO: $444.90
Hero: $98.50
SB: $242.90
BB: $98.50

Pre-flop: (5 players) Hero is Button with Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/heart.gif[/img]
UTG folds, <font color="#cc0000">CO raises to $2</font>, <font color="#cc0000">Hero raises to $7.5</font>, 2 folds, CO calls.

Flop: 6[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] ($16.5, 2 players)
CO checks, <font color="#cc0000">Hero bets $10</font>, CO calls.

Turn: 5[img]/images/graemlins/spade.gif[/img] ($36.5, 2 players)
<font color="#cc0000">CO bets $30</font>,

[Fletcher19]

he looks to be representing the flush, against a reg i might try something here but against an unknown i fold

maybe bet more on the flop too