BTN: $18.35 (73.4 bb)
Hero (SB): $25.10 (100.4 bb)
BB: $17.50 (70 bb)
UTG: $47.30 (189.2 bb)
MP: $25 (100 bb)
CO: $23.95 (95.8 bb) No info but probably big fish.
Preflop: Hero is SB with A♣ K♦
2 folds, CO calls $0.25, BTN folds, Hero raises to $1.20, BB folds, CO calls $0.95
Flop: ($2.65) 9♣ 9♥ K♣ (2 players)
Hero bets $1.70, CO calls $1.70
Turn: ($6.05) 4♦ (2 players)
Hero bets $3.90, CO raises to $10.25
Spoiler
Hero folds
Even though our hand looks strong here, but when presumable fish raises here OTT, I really don't think he's doing this with any draw, nor with KQ, when we know it is just @NL25.