A $10-$20 game. You have the J-J in middle position and raise an early limper. The big blind calls. The early limper now reraises. You call as well as the big blind. There is $95 in the pot and three players. The flop comes: T-8-4, giving you an overpair and a backdoor flush-draw. The big blind checks. The early player bets. You raise to get out the big blind, who folds. The early player reraises and you call. There is $155 in the pot and two players. The turn is the 9, so you have picked up an open-end straight-flush draw. Your opponent bets. What do you do?