stacking off superlight vs carrotsnake

[SilentNoise]

Poker Stars - No Limit Hold'em Cash Game - $1/$2 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $338.05
BB: $129.30
Hero (UTG): $209.00
CO: $165.00
BTN: $281.00

Preflop: Hero is dealt Q[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/spade.gif[/img] (5 Players)
<font color="red">Hero raises to $8.00</font>, CO folds, BTN calls $8.00, SB calls $7.00, BB folds

Flop: ($26) 4[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/spade.gif[/img] (3 Players)
<font color="red">SB bets $4.00</font>, <font color="red">Hero raises to $18.00</font>, <font color="red">BTN raises to $50.00</font>, SB folds, Hero calls $32.00

Turn: ($130) K[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $85.00</font>, <font color="red">Hero raises all-in to $151.00</font>

Obviously under normal circumstances this is an easy flop fold. The hand immediately before, i iso-raised somebody preflop and raised their donkbet and he folded. In my notess for this player i had a note that he folds to donkbets pretty consistently.

carrotsnake was also 8tabling at the time, so im not sure if he noticed the previous hand on that table where i raised his donkbet and he folded. At the time i thought he might have noticed, so i thought he might be 3betting my flop raise with air thinking that im just raising his donkbet knowing that he folds alot.

i thought carrotsnake may have been on some kind of draw...so was debating whether to bet/call or crai(with no fold equity so effectively check/call)...but eventually decided that if he had pure air i could let him carry on bluffing.

what do you think? fold the turn since he normally gives up once his bluff gets caught? or call since hes definately laggy enough to carry on firing knowing that ill almost never just flat call his flop raise with a set/twopair since it must appear that he likes his hand?