15/30 awkward turn position multiway w/ 99

[elindauer]

Loose bad player who plays 50% of his hands limps. I raise 99. Both blinds (decent players) and the limper call.

Flop: QJ3 w/ 2 diamonds.

It's checked to me and I take the free card.

Turn: 8d putting a possible flush out there.

SB bets. BB calls. Limper calls. I have the 9d... what's my action?

thanks.
eric