Your preflop raiser has something like AK or AQ, and the other guy might have a draw.

Your read here has to be that your opponents are not drawing to a better full house. That's because the flop came out 6 high. If someone had the 6 here they would raise or fold on the flop. If someone had 56 they would raise real hard.

The only thing you have to be worried about is a high pocket pair spiking a set. Neither of these guys have that. The guy with a high pocket pair would re-raise your $5. You overbet the flop like you hit the 6 rag and don't want overs chasing. That's why I don't put either of them on that high pocket pair. Your never going to buy this pot if someone has a high pocket pair. Your going to get called all-in. Trust me, they don't have it. The board is too scary to smooth call $5 with a high pocket pair.

Given all of that, this is NOT a good time to slowplay by checking. It has nothing to do with you getting drawn out either. It has to do with the high likelyhood that one of these opponents will call an additional bet. This is a good time to act weak and bet just $5 again. Don't buy the pot. Just bet enough where they want to see that river.

This is a perfect example of where you take advantage of pot committment. Your two opponents are leveraging themselves against each other by calling $5. They have committed each other, and will stay in for additional like bets. You should bet $5 again. It look like YOU are drawing now, and at least one of them will call or even go over the top sensing weakness.

$5 is the correct turn bet in this situation.