50NL - Suggested Flop and Turn Play in Large 3 way pot w/ draws

[allrightfine]

Button is 26/10/3 after 120 hands.
UTG is a donkey

Did I misplay the flop? My reasoning for the flat call is I wanted UTG to call so I could get the rest of his stack if as 10 or a spade hit.

As played, what is my turn play here? I'm getting about 2.3/1 odds here.



Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 4 Players - (LegoPoker HH Converter)

<font color="black">Hero (SB): $49.55</font>
BB: $51.65
UTG: $17.25
BTN: $55.80

<font color="black">Preflop:</font> Hero is dealt Q[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/spade.gif[/img] (4 Players)
UTG checks, <font color="red">BTN raises to $2.50</font>, Hero calls $2.25, BB folds, UTG calls $2

<font color="black">Flop:</font> ($8) 9[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] 8 (3 Players)
Hero checks, UTG checks, <font color="red">BTN bets $4.50</font>, Hero calls $4.50, UTG calls $4.50

<font color="black">Turn:</font> ($21.50) J (3 Players)
Hero checks, UTG checks, <font color="red">BTN bets $16</font>, Hero ???