How's this fold? Too nitty? Didn't really have many hands on BTN but he seemed to be kind of a solid reg. I don't expect many regs to make big moves here but maybe it's just a call.

CO: 135.22 BB (VPIP: 77.38, PFR: 28.57, 3Bet Preflop: 10.00, Hands: 88)
BTN: 201.63 BB (VPIP: 29.23, PFR: 17.44, 3Bet Preflop: 8.60, Hands: 201)
SB: 98.84 BB (VPIP: 28.07, PFR: 23.51, 3Bet Preflop: 9.43, Hands: 296)
Hero (BB): 205.74 BB

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Ac Ah
CO calls 1 BB, BTN raises to 4 BB, fold, Hero raises to 16 BB, fold, BTN calls 12 BB

Flop : (33.5 BB, 2 players) 2s Td Jh
Hero bets 11.16 BB, BTN calls 11.16 BB

Turn : (55.82 BB, 2 players) 6d
Hero bets 37.21 BB, BTN calls 37.21 BB

River : (130.24 BB, 2 players) Ts
Hero bets 43.41 BB, BTN raises to 137.26 BB and is all-in, fold