Hero (CO): 487.8 BB
BTN: 100 BB
SB: 102.5 BB
BB: 212.6 BB
UTG: 100 BB
MP: 126.4 BB
SB posts SB 0.5 BB, BB posts BB 1 BB
Pre Flop: (pot: 1.5 BB) Hero has J♦ A♣
fold, fold, Hero raises to 3 BB, BTN calls 3 BB, fold, BB calls 2 BB
Flop: (9.5 BB, 3 players) 5♣ 9♥ A♦
BB checks, Hero bets 5 BB, BTN calls 5 BB, fold
Turn: (19.5 BB, 2 players) 7♣
Hero bets 11 BB, BTN calls 11 BB
River: (41.5 BB, 2 players) K♥
Hero checks, BTN bets 40 BB, ???
Are looking at this hand I don't think buttons floats with someone else to act.
At river in my mind I don't see him value betting a worst ace like AT.
What are your thoughts on this?