PLO8 ($100)...Aaaaaaaaaaaw Crap, DAMN THE TURN!

[Omaha8sPoker]

No reads on the villian...

I'm in MP and raise with A4T2, I think one suit...The SB calls as does the villian, both of whom have me covered...There is about $15 in the pot...

FLOP: 10 8 4, rainbow

A GORGEOUS flop for me...I lead out with a $12 bet...SB and villian call...Pot is now $51...

Turn a diabolical 2 of spades, putting 2 spades on board...The villian insta-bets pot...

MY READ: I would have bet every last penny that I have earned in my poker career that this guy had A3 with the nut spades...

What do we do here if that is our read? Do we give it up since we're being free-rolled or do we call since we know we have the high?