Looks fine. All you can beat is a bluff, and the UTG limper probably has a K or Q. Since this is 6-max 0.5/1, you might try firing again on the turn after the SB folded. That makes it heads up and you have a much better chance of winning right there. It's risky to expect anyone at these limits to fold, but that is really your only line that wins you this pot, assuming you don't draw out. It's really up to you how small a pot you want to fight over.