PLO 400 - difficult turn situation

[BlueBear]

PLO 2/4, max buyin $400

- BB sitting in seat 1 with $244.48
- UTG sitting in seat 2 with $1357.20
- MP1 sitting in seat 3 with $859.00
- MP2 sitting in seat 4 with $1137.10
- BlueBear sitting in seat 5 with $459.60 [Dealer]
- SB sitting in seat 6 with $394.00

SB posted the small blind - $2.00
BB posted the big blind - $4.00

** Dealt BlueBear: 3 of Clubs, 5 of Hearts, 9 of Clubs, 9 of Diamonds

UTG folded
MP1 called - $4.00
MP2 called - $4.00
BlueBear called - $4.00
SB called - $4.00
BB checked

** Flop: 4 of Hearts, 6 of Spades, 9 of Spades ($20)

I flopped the top set on a very dangerous board, guess I'll have to pump the chips in.

SB checked
BB checked
MP1 bet - $12.00
MP2 called - $12.00
BlueBear raised - $68.00
SB folded
BB folded
MP1 called - $68.00
MP2 called - $68.00

** Turn: 7 of Clubs ($224)

MP1 checked
MP2 checked
BlueBear ???

A dangerous card that completes a lower straight for me. Against two opponents who called my max bet, MP1 or MP2 could possibly be playing ten-7-8-x suited, should I fire off another shot or take the free card? Pot is $224 and I have $387 left. Opponents are capable of trapping/check-raising with the top straight.