[25NL] TPTK raised on the turn; Easy fold?

[vanoff]

Ultimate Bet - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $26.09
Hero (BB): $36.41
UTG: $10.99
MP: $27.07
CO: $36.46 -----> 25.8/10/1.4(80)
BTN: $22.17

Preflop: Hero is dealt (6 Players)
2 folds, CO calls $0.25, 2 folds, <font color="red">Hero raises to $1.25</font>, CO calls $1.00

Flop: ($2.60) (2 Players)
<font color="red">Hero bets $2.00</font>, CO calls $2.00

Turn: ($6.60) (2 Players)
<font color="red">Hero bets $5.00</font>, <font color="red">CO raises to $12.00</font>, Hero is confused?!
Pot Size: $23.60

What's going on in here? What's the standard line?

[johndenver]

yep, easy for me

with no reads, first time he's done it to you, i think its at least 2 pair , maybe str8