[Closed] NL25 - A6s @ BTN

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.1/$0.25 No-Limit Hold'em (6 handed)

Known players:
[tg]MP2$16.81:///////;MP3$9.00:///////;CO$4.96:///////;BU (Hero)$13.31:///////;SB$13.33:///////;BB$12.50:///////;[/tg]

Preflop: Hero is BU with 6:d, A:d.
3 folds, Hero raises to $0.75, SB calls $0.65, BB folds.

Flop: ($1.75) 9:c, A:c, 8:d (2 players)
SB checks, Hero bets $1.00, SB calls $1.00.

Turn: ($3.75) J:d (2 players)
SB checks, Hero bets $2.25, SB raises to $5.25, Hero raises to $11.56, SB calls $6.31.

River: ($26.87) K:s (2 players)

Final Pot: $26.87.
Results follow:

Hero shows a pair of aces(6:d A:d).
SB shows a straight, ace high(T:s Q:h).

SB wins with a straight, ace high(T:s Q:h).

villan is 75/25/50 uber fish. Do I check turn behind and reevaulate at river? Because calling his 4bet commits me anyway