Thoughts on this hand? I decided to go bet/fold on the turn, anyone just give up?

Party Poker
No Limit Holdem Ring game
Blinds: $1/$2
6 players


Stack sizes:
Hero: $261.88
UTG+1: $200
CO: $309.35
Button: $197
SB: $225.20
BB: $40

Pre-flop: (6 players) Hero is UTG with
Hero raises to $7, UTG+1 folds, CO calls, Button folds, SB calls, BB folds.

Flop: ($23, 3 players)
SB checks, Hero bets $21, CO calls, SB folds.

Turn: ($65, 2 players)
Hero bets $40, CO raises to $88, Hero folds.
Uncalled bets: $48 returned to CO.

Results:
Final pot: $145

i don't think he really calls a turn bet with anything that you're ahead of, and he's not going to be bluffing the turn with worse when you check to him too often either, so i think it's a check-fold.

Sorry yeah it's a check-fold, I actually already thought of that I just didn't think that was your question.