UTG is recreational player, passive before play only limp-call or limp-fold preflop, CO is regular player. Here I decide fold because I dont see before from this player on UTG 3bet/4bet and CO can has strong hand too.
PokerStars, Hold'em No Limit - $0.05/$0.10 - 6 players
Replay this hand on Pokeit - https://pokeit.co/public/425mNOtFN/r
UTG: $7.93 (79 bb)
MP (Hero): $11.58 (116 bb)
CO: $10.85 (109 bb)
BU: $11.16 (112 bb)
SB: $10.13 (101 bb)
BB: $12.45 (125 bb)
Pre-Flop: ($0.15) Hero is MP with A♥ K♣
UTG calls $0.10, Hero raises to $0.40, 1 fold, BTN 3-bets to $1, 2 players fold, UTG 4-bets to $7.93 (all-in), MP (Hero) folds, 1 fold
Total pot: $2.55 (Rake: $0)
UTG wins $2.55