How do you play this turn?

[CyberianBull]

Getting sucked out on a lot with donks chasing and hitting flush draws all day...

Villain is 46/20/1
I am running 21/18/3 -- but I doubt villain knows that.

Ultimate Bet - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $41.44
BB: $23.46
Hero (UTG): $25.00
MP: $27.53
CO: $15.68
BTN: $21.50

Preflop: Hero is dealt 8[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (6 Players)
<font color="red">Hero raises to $1.00</font>, MP calls $1.00, CO folds, BTN calls $1.00, 2 folds

Flop: ($3.35) 2[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/heart.gif[/img] (3 Players)
<font color="red">Hero bets $2.50</font>, MP folds, BTN calls $2.50

Turn: ($8.35) 9[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero ?<font color="red">

I put him on a weak Ace or flush draw here -- I have seen him re-raise on the flop with anything stronger.

If we check and villain bets do we shove?
If we bet and villain raises do we shove?
If it goes check-check do we value bet the river?
Can we stand a river raise if a non-spade hits -- or is it always a flush here?

thanks