I'm still getting to grips with cash games but is this ok? CO had been tight, I don't think he'd bet or raised for about 4 orbits. I didn't have his stats at this point, which was after about 100 hands, but I checked afterwards and over 206 hands he was 16.5/3.4/0.57
I hadn't seen him raise with a draw previously and I just felt there were much worse players at the table to take money from.

Hold'em No Limit ($0.05/$0.10)

UTG: ($6.15)
UTG+1: ($5.49)
CO: ($19.99)
Button: ($11.69)
SB: ($9.33)
Hero: ($22.57)

Preflop: Hero is BB with K , 5 .
1 fold, UTG+1 calls $0.10, CO calls $0.10, 1 fold, SB calls $0.05, Hero checks

Flop: ($0.40) K , J , 5 (4 players)
SB checks, Hero bets $0.30, 1 fold, CO raises to $1, 1 fold, Hero folds