Preflop I don't know if I should be so agg in the SB.
Flop, I have no idea where to put these guys. I thought I may only have 2 outs but the pot was huge.
The turn made me think that one was on a flush draw and the other had a weak K.

Poker Stars
Limit: $1/$2
6 players

Pre-flop: (6 players) Hero is SB with
UTG folds, UTG+1 raises, CO calls, Button 3-bets, Hero caps, BB calls, UTG+1 calls, CO calls, Button calls.

Flop: (17.5SB, 5 players)
Hero bets, BB calls, UTG+1 raises, 2 folds, Hero calls, BB 3-bets, UTG+1 calls, Hero calls.

Turn: (13.25BB, 3 players)
Hero checks, BB checks, UTG+1 checks.

River: (13.25BB, 3 players)
Hero checks, BB checks, UTG+1 checks.

Results:
Final pot: 13.25BB

Since the turn made you think something, what did the river make you think? This is one of the most confusing betting series I've ever seen. I can't imagine either player checking down the turn and river with any king in 6-max. I don't mind being that aggro in 6-max, especially against the donkeys who play there alot. UTG+1 could be raising on the flop with some kind of flush draw...I have no idea what the BB is cold calling a cap preflop, 3-betting on the flop and checking the turn and river; I can only guess it was an OESD.

Are there any reads on these opponents?

I guess I am just suprised two people folded on the flop. I guess this is how my buddy scored $120 in eight minutes at a 1/2 limit PP table. Insane.

If you got the option to check this one down, take it. Can't fold for 1 bet on the river either IMO, pot was ginormous. I'm guessing you won this one, but I wouldn't feel bad about any missed bets...guessing that each wouldn't have called a river bet.

That hand history is goofy.

They both had flush draws with no pair. The BB had the nut draw, the other guy had 2-4. I should have bet the river I guess, but the turn really threw me off.

Not betting the river is only a mistake if you know you would call any raise they might make. If you were planning on folding to any raise anyways, then checking is fine I think because it saves you a bet. These guys have stuck with their hands so far, so it is possible that they might feel empowered to bluff with their missed draws...donks seem to like doing that.

It depends on the table again how the hand would/could be played. If either of these players were passive I would muck the QQ when it is 3 bet on the flop. If they often are over-aggressive then you can call the 3-bet and donk the turn and river when obvious draws don't come in.

They certainly don't seem overly aggressive if neither of them take stabs at the turn or river however.