[beachbum]

There's a good chance you're ahead of button here, but probably not both. That being said, the c/c line on the river might be best. How aggro is the CO in these spots? If you check to him, what hands will he bet or raise with? Pairs, straights, or bluff representing the draw?

A standard line here would be check and call against one opponent but not overcall. However if the river went "check, bet, call,...", the button's call won't really mean much since he'll call with lots of hands you're ahead of. I think c/c one bet back to me works here against an aggro opponent and loose river caller.