flopped J high flush out of BB unraised pot

[Flip_Dog]

PokerStars No-Limit Hold'em, $1.00 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">Hero ($99)</font>
BB ($217)
UTG ($50.70)
<font color="#C00000">MP ($121.25)</font>
Button ($105.60)

Preflop: Hero is SB with J[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img].
UTG calls $1, MP calls $1, Button calls $1, Hero completes, BB checks.

Flop: ($5) 4[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets $4</font>, BB folds, UTG folds, <font color="#CC3333">MP raises to $12</font>, Button calls $12, Hero calls $8.

Turn: ($41) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">MP bets $17</font>, Button folds, Hero calls $17.

River: ($75) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $20</font>, MP calls $20.

Final Pot: $115

CO is 48 9 2, Btn is solid. My plan was to get to showdown w. out going broke, It worked out as planned but was it the best startegy here?