Message Board : bottom set w/ insane flop action

Yesterday I played in a 2-5 game at a local casino.  The game had a mix of tight and loose players, about half of them regulars.  Hero has $525 and gets dealt 3h3c in MP.  3 people limp, hero limps too, as do the CO, button and both blinds.

 Flop comes 7d Kh 3d.  The blinds and one UTG check.  UTG+1 bets $25.  Next limper raises to $50.  Hero makes is $200 to go.  It folds to the small blind who goes all-in and has the hero covered.  BB and UTG fold and UTG+1 goes all-in who has hero & UTG covered.  Next player folds, and hero is left with a decision.  

 SB is a regular who plays pretty solid tight/aggressive poker and occasionally has something surprising at showdown.  UTG+1 is unknown before tonight, has played extremely tight pre-flop for the past 2 hours, but did once knowingly get all his money in on a draw (which hit).

 Does hero call or fold?

Agreed.  Easy all in.  You are only behind 2 hands right now, KK or 77.  KK limped 6 way action is pretty unlikely…77 certainly possible.  But folding after putting in half your stack, to top pairs with flush draws or less, would be a bad mistake. 

If you lose to set over set…so be it…it happens.

If someone hits the flush, you could still improve to the FH with less than 2:1 odds…much less than what the pot is paying you.

Thanks for the comments.  Went out of town away from computer all weekend.

What if I mention that the small blind had about $1000 in front of him, so the UTG+1 called another $975 into $1310 (less the rake)?  Even though for Hero their effective stacks are $525, does he need to consider what their stack sizes are to each other?  If so, does it change the analysis at all?

I’m thinking that one of the two villians has to show a set here, which will have to be bigger than hero’s.  I can’t think of any hand that SB can push with other than a set that isn’t a mistake.