Flopped Trips: Too Slow? Too Fast?

[TomBrooks]

$2/$4 6m 6h

Button is 37/3/ ~.6 after 32 My impression is that he's too conservative but othewise solid.

Preflop: Hero is CO with 10 [img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img]
UTG calls, MP calls, Hero calls, Button calls, SB folds, BB checks.

Flop: (5.5 SB) 7[img]/images/graemlins/diamond.gif[/img], 10[img]/images/graemlins/heart.gif[/img], 10[img]/images/graemlins/diamond.gif[/img] (5 players)
Check, check, checks, Hero bets, Button raises, fold, fold, fold, Hero calls.

Turn: (4.5 BB) K[img]/images/graemlins/spade.gif[/img] (2 players)
Hero bets, Button raises, Hero 3bets, Button caps.

River: (12.5 BB) 9[img]/images/graemlins/diamond.gif[/img]
Hero bets, Button raises, Hero raises

Did I play the flop too slowly? Did I play the turn too hard? I think the river is OK.