$25.00 No Limit Hold'em - 4 players -
BB: $32.91
CO: $28.10
Hero (BTN): $84.02
SB: $42.57
Pre Flop: ($0.37) Hero is BTN with Q 
4
1 fold, Hero raises to $0.75, SB calls $0.63, 1 fold
Flop: ($1.75) K 
6 
3 (2 players)
SB checks, Hero bets $1.25, SB calls $1.25
Turn: ($4.25) 2 (2 players)
SB checks, Hero bets $3.00, SB raises to $8.12, Hero calls $5.12
River: ($20.49) 7 (2 players)
SB checks, Hero checks
SB
I thought against the turn chR I have decent implied odds, especially deepstack, the straight would be quite obvious, but he could give me a payout if I hit my backdoor flush.
On the river his check is strange, I couldnt decide if he goes for potcontroll / bluff inducing, or gave up with some kind of draw (hard to imagine though, after his flop ch/call...). Do you think it's worth stabbing here?