PokerStars No-Limit Hold'em, $2 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($558.55)
MP ($265.60)
CO ($94.45)
Button ($194)
SB ($222.80)
Hero ($200)

Preflop: Hero is BB with A, K.
4 folds, SB raises to $6, Hero raises to $18, SB calls $12.

Flop: ($36) 3, 5, 2 (2 players)
SB checks, Hero checks.

Turn: ($36) 8 (2 players)
SB checks, Hero bets $16, SB calls $16.

River: ($68) 5 (2 players)
SB bets $44, Hero calls $44.

Final Pot: $156


I thought his range here is weighted towards mid pp because he was 4betting AK and big pairs. So I checked flop because I expected him to reraise. Then I hit on turn, and threw a tiny value bet. Probably shoulda done $26

This is Vs good thinking reg soccertease. This river is a fold, or do we have to call? he can't be betting a Q for value, so fold right?