Villain is 86/21/43. Guy has basically played every hand since he sat down. Thoughts on this one?

PokerStars No-Limit Hold'em, $0.10 BB (5 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP ($35.60)
Hero (Button) ($16.90)
SB ($11)
BB ($10)
UTG ($10.20)

Preflop: Hero is Button with Q, Q
2 folds, Hero bets $0.35, SB calls $0.30, 1 fold

Flop: ($0.80) J, 7, 8 (2 players)
SB checks, Hero bets $0.65, SB calls $0.65

Turn: ($2.10) K (2 players)
SB checks, Hero bets $1.50, SB calls $1.50

River: ($5.10) K (2 players)
SB bets $3.10, Hero ???