[mikeca]

At B&M 2/4 the players are so erratic it is hard to know where you stand. The SB is playing almost every hand, but how does he play? Aggressive? Passive?

What to do here depends on your read of SB. It is possible the SB thinks you are on AK and his one pair is ahead of you, but his betting pattern looks more like a set or two pair. I would not raise the turn and just call him down, unless the river is a Q. Find out what he played like this. I would never lay this down to an unknown on that board.