Unraised pot, pair+draw on flop gets better on turn

[Ghazban]

Villain is very loose/passive but won't just call on all streets with an underpair or anything like that. I felt like checking the turn would enable me to get paid on the river if the flush misses by a weaker holding than would call the turn. Give me a better line if you hate this.

Party Poker No-Limit Hold'em, $2 BB (6 max, 6 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

CO ($206.33)
Hero ($328.95)
SB ($209.50)
BB ($222.80)
UTG ($200.60)
MP ($204.22)

Preflop: Hero is Button with A/images/graemlins/heart.gif, 9/images/graemlins/heart.gif. SB posts a blind of $1.
<font color="#666666">1 fold</font>, MP calls $2, <font color="#666666">1 fold</font>, Hero calls $2, SB (poster) completes, BB checks.

Flop: ($8) 7/images/graemlins/heart.gif, A/images/graemlins/diamond.gif, K/images/graemlins/heart.gif <font color="#0000FF">(4 players)</font>
SB checks, BB checks, MP checks, <font color="#CC3333">Hero bets $6</font>, SB folds, BB folds, MP calls $6.

Turn: ($20) A/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
MP checks, Hero checks.

River: ($20) J/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
MP checks, <font color="#CC3333">Hero bets $20</font>

[TheWorstPlayer]

it'a fine. either he's drawing dead or you are. the flush is almost completely irrelevant in this hand.