[skp]

I recall folding a set on the turn just once. That too, it was KKK but it was because I knew with certainty that I was up against AAA (i.e. very tight opponent who simply would never go 3 bets on the turn without the nuts which was AA at the time).

On your hand, you don't have a fold because when it goes three bets, you have to think that the raiser and 3 bettor have the straight...otherwise, why are they raising and 3 betting? That just leaves the bettor who may or may not have top two. Indeed, why is he betting into 3 opponents with top two given how easy it is for someone to have a straight. Enough doubt there that I would call. No doubt the pots odds are there for a ten outer. You may or may not have the pot odds for a 4 outer but you don't give the preflop and flop action for us to calculate.