flopped top set and tons of action 3-6NL UB

[pologuy64]

playing 4 handed

No true reads but both players have never been seen before and nothing speical stands out about either one. I would lean more to calling them both donkeys that will make a mistake sooner or later.

stack sizes:
sb has 400
me 1000
bb 620

I make it 27 utg with 1010 and the sb re-pops it to 50 more. bb calls as do I.

flop(231) 8 9 10 (suits r not important)
sb goes all in as expected. bb thinks for a while and just calls. Hero re-pops BB all in.

What do you all think of this play and all this action? It was really hard for me to put someone on a str8 with the preflop action. Is there anyway possible that i can fold on this flop.