50NL Flopped a set of Jacks

[dandelos]

Poker No-Limit Hold'em, $.50 BB (9 handed) Hand History converter Courtesy of PokerZion.com

SB ($20.50)
BB ($10)
Hero ($39.75)
UTG+1 ($25.25)
MP1 ($41.20)
MP2 ($25.60)
MP3 ($18.05)
CO ($181.80)
Button ($49)

Preflop: Hero is UTG with J[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $0.50.
BB checks, Hero calls $0.50, <font color="#666666">1 fold</font>, MP1 calls $0.50, <font color="#666666">3 folds</font>, Button calls $0.50, SB (poster) checks.

Flop: ($2.50) 8[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets $2.5</font>, MP1 calls $2.50, Button folds, SB calls $2.50, BB folds.

Turn: ($10) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $18</font>, MP1 calls $18, SB folds.

River: ($46) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $18.75 (All-In)</font>, MP1 calls $18.75.

Final Pot: $83.50

I think it was wrong to call (rather than raise) on the flop. But -how- wrong, that is the question? Also, should I have acted any differently on the turn (or river, for that matter)?