Poker Stars, $0.10/$0.25 No Limit Hold'em Cash, 6 Players

SB: $38.65 (154.6 bb)
BB: $7.50 (30 bb)
UTG: $40.27 (161.1 bb)
MP: $28.04 (112.2 bb)
Hero (CO): $26.64 (106.6 bb)
BTN: $34.28 (137.1 bb)

Preflop: Hero is CO with K K
UTG folds, MP raises to $0.75, Hero raises to $2.20, 3 folds, MP calls $1.45

Flop: ($4.75) 4 A T (2 players)
MP checks, Hero bets $2.20, MP raises to $5.50, Hero calls $3.30

Turn: ($15.75) A (2 players)
MP bets $20.34 and is all-in, hero?