Party Poker No-Limit Hold'em, $ BB (9 handed) FTR converter on zerodivide.cx

MP1 ($56.10)
MP2 ($31.81)
MP3 ($38.81)
Hero ($52.30)
Button ($51.75)
SB ($31.37)
BB ($33.10)
UTG ($48.50)
UTG+1 ($50)

Preflop: Hero is CO with J, J. SB posts a blind of $0.25. UTG posts a blind of $0.50.
2 folds, MP2 raises to $2, 1 fold, Hero calls $2, 3 folds.

Flop: ($4.75) 7, 5, 3 (3 players)
MP2 bets $1, Hero raises to $3, MP2 raises to $8, Hero calls $5.

Turn: ($20.75) 7 (3 players)
MP2 checks, Hero checks.

River: ($20.75) 6 (3 players)
MP2 bets $10, Hero ????

No reads. Put him on an overpair with the preflop action and the flop raise. Looking back on it, should I have bet the turn? It puts two clubs on the board, and I'm not too sure that his flop bet might have meant strength... but the river bet seemed like he wanted me to call.