3/5: Trips on the River faces big overbet.

[beset7]

3/5 NL 9handed. Stacks are about 800 on this one.

SB is loose agressive. In PT terms I'd say he's like a 50/20/3. He's been check/raising me on the flop a lot. I've never caught him bluffing but that doesn't mean much as we've only played about 20-30hours together.

Its folded to me in the CO with KQo I raise to 20 (my standard pfr). Only the SB Calls. Flop comes 9 6 4 rainbow (suits unimportant). SB Checks, I check behind. Turn is a Q. He checks, I bet the pot, he calls.

River is another Q, he bets 400, I look at the little pot out in the middle and I...

Need to know anything else about SB?