Make this fold?

No reads.

PokerStars No-Limit Hold'em, $0.10 BB (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP1 ($7.25)
MP2 ($5.75)
CO ($4.50)
Button ($11.35)
SB ($9.90)
Hero ($11.90)
UTG ($26.20)

Preflop: Hero is BB with 7, 5.
UTG calls $0.10, 2 folds, CO calls $0.10, 1 fold, SB completes, Hero checks.

Flop: ($0.40) 2, 5, 7 (4 players)
SB bets $0.3, Hero raises to $1, UTG folds, CO calls $1, SB calls $0.70.

Turn: ($3.40) 6 (3 players)
SB checks, Hero bets $2.25, CO raises to $3.4, SB raises to $8.8, Hero...

when you are squeezed between two betters you usually need a pretty great hand to call...but i dont really play 10nl too much...i would assume co has two pair or trips and sb made a straight. even 6-7 has you beat here...i fold w/out a read that says my opponents are morons.