[Redd]

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What line do you take if everyone calls the bet on the flop? Again, very likely behind, but it's a difficult fold to a bet, raise on the turn.

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I think you're overestimating how likely it is we're behind if everyone calls the flop bet. We're holding an overpair, and some very weak hands will be calling in this sized pot. I'd lead the turn regardless of the number of callers, and reevaluate if raised depending on who's in and who raised.