Bet the river

[shemp]

Online 15/30. 8-way. After a lot of folding, I've just gotten cracked twice in succession and made a bad river bet with A-high, so my image is poor.

Preflop I raise UTG w/ JJ (good starters come in bunches), MP, Button and SB call. 9 SBs.

Flop T96 rainbow. I bet, fold, button raises, BB calls, I 3-bet and both call. I think Button has a T or a 9, but probably not AT. He doesn't need a lot to raise. 18 SBs.

Turn 5, and second club. [T965] I bet and both call. 12 BBs.

River 8, and third club. [T9658] Checked to me. I think SB would bet a straight or two pair here. I Bet. Button raises. SB folds, I call.

Thoughts?