Flopping a flush draw vs. 2 opponents

[atrifix]

Hi. I'm new to poker and this site.

Party Poker 1/2 Hold'em (10 handed)

Preflop: Hero is SB with A[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/club.gif[/img].
UTG calls, UTG+1 folds, UTG+2 folds, MP1 calls, MP2 folds, MP3 folds, CO folds, Button folds, Hero completes, BB checks.

Flop: (4 SB) J[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="blue">(4 players)</font>
<font color="CC3333">Hero bets</font>, <font color="CC3333">BB raises</font>, UTG folds, MP1 calls, <font color="CC3333">Hero 3-bets</font>, <font color="CC3333">BB caps</font>, MP1 calls, Hero calls.

Turn: (8 BB) K[img]/images/graemlins/spade.gif[/img] <font color="blue">(3 players)</font>
Hero checks, <font color="CC3333">BB bets</font>, MP1 calls, <font color="CC3333">Hero raises</font>, BB calls, MP1 calls.

River: (14 BB) Q[img]/images/graemlins/spade.gif[/img] <font color="blue">(3 players)</font>
Hero checks, BB checks, <font color="CC3333">MP1 bets</font>, Hero folds, BB calls.

Final Pot: 16 BB

Results in white:
<font color="white">MP1 shows 8s 5s.
BB shows Js 3h.</font>

I think I played this correctly, but I'm not sure. My idea was to just call on the turn if MP1 folded (since I didn't want to get 3-bet) and check-raise the river if the flush hit. I'm not sure what I would have done if I spiked an ace on the river. All comments are appreciated.