Time to Fold a Set? (NL200 5max)

[SinkRox]

Seat 2: Hero ($271.80 in chips)
Seat 5: UTG ($244.80 in chips)
Seat 6: Santzes1 ($275.60 in chips)
Seat 8: _Terravore ($191 in chips)
Seat 10: SB ($253.80 in chips)

Hero dealt 6[img]/images/graemlins/club.gif[/img],6[img]/images/graemlins/spade.gif[/img]

SB posts blind ($1), Hero posts blind ($2).

PRE-FLOP
UTG bets $7, Santzes1 folds, _Terravore folds, SB calls $6, Hero calls $5.

Flop Q[img]/images/graemlins/heart.gif[/img],4[img]/images/graemlins/diamond.gif[/img],6[img]/images/graemlins/diamond.gif[/img] ($21)
SB checks, Hero bets $16, UTG calls $16, SB calls $16.

Turn Q[img]/images/graemlins/heart.gif[/img],4[img]/images/graemlins/diamond.gif[/img],6[img]/images/graemlins/diamond.gif[/img],3[img]/images/graemlins/diamond.gif[/img] ($69)
SB checks, Hero checks, UTG bets $40, SB bets $100, Hero ?

Seems pretty obvious at least one has hit their flush, I felt there was a good 70-80% chance both of them would be willing to get all their chips in on this turn, but is it still a fold for me? After all we all still had over $200 at the turn.

PS I hate folding sets... is this one of the rare times I should?