Red Kings facing big flop raise. What's my play?

[guns4show]

five handed, BB has raised his last 4 big blinds and is very loose and aggressive. SB is loose and pretty passive (but I have seen him make two small bluffs). Both have trouble laying down hands to large raises, especially when they have invested money.

.50/1
I have $40, SB has $30, and BB has us way covered with more than $80.

I am UTG and limp with K[img]/images/graemlins/heart.gif[/img]K[img]/images/graemlins/diamond.gif[/img] expecting a raise (70% of the time). Two fold and SB completes and BB checks. Complete backfire. Flop comes Q [img]/images/graemlins/heart.gif[/img] T [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/spade.gif[/img]. SB bets 6 and I am nearly certain he has no queen based off of a tell I picked up. BB makes a big raise to 25. I am pretty sure he also senses weakness in SB.

Now what?