FYI: J9s means J9 suited. J
9
or Js9s or J9ss means J9 of spades.
As for the hand, I'd probably raise and fold to a reraise here. You could flat call smaller flushes and sets and raise/call Q high and A high flushes.
It sucks if opponent bet/jams river with A
X so if you really think he's capable of that, then I guess you can bet/call river.