25nl TT sick level or donkpush?

[vixticator]

Opponent here 29/11/1, I checked because the board paired trying to induce a bet. IMO he isn't that strong because he didn't raise flop. It's too tempting to check behind (for him). And he can get me off of AK (which I clearly hold). Crazy?

Poker Stars, $0.10/$0.25 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

Hero (SB): $27
BB: $5.55
UTG: $71.40
MP: $30.55
CO: $43.75
BTN: $5.65

Pre-Flop: T[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/heart.gif[/img] dealt to Hero (SB)
2 folds, <font color="red">CO raises to $1</font>, BTN folds, <font color="red">Hero raises to $3.25</font>, BB folds, CO calls $2.25

Flop: ($6.75) 3[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $4</font>, CO calls $4

Turn: ($14.75) 5[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $7</font>, <font color="red">Hero raises to $19.75 and is All-In</font>