Interesting: Sucker End of Straight

[lag0n]

Get it in on the turn. There's no reason to play scared if you don't have accurate reads. At least OP didn't mention any.

It can sometimes be better for example to play tiny flushes a little carefully against specific opponents but here we have no reason to believe that someone has exactly AK or K9. If someone had shown down two pair wouldn't you have felt terrible for not betting more aggressively?