Ultimate Bet No-Limit Hold'em, $1 BB (5 handed) Ultimate-Bet Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

Hero ($98.50)
MP ($106.40)
Button ($34.65)
SB ($113.30)
BB ($99.30)

Preflop: Hero is UTG with , .
Hero raises to $3.50, MP calls $3.50, Button calls $3.50, 1 fold, BB calls $2.50.

Flop: ($14.50) , , (4 players)
BB checks, Hero ???

Converter messed this one up. SB and BB are the callers along with the button. Button and BB are 30/10 and MP running about 50/10.

Do you take one stab at it and if so what size? With 3 loose passives I felt there was likely an Ace out there that would call.

So plan for 1 bet and check/fold rest of the way or...what do you normally do?