[Groty]

You're trying to sell BB you were helped by the river ace (and that your most likely holding is AT). The problem is that many aggessive players in a short handed game will raise preflop with AT. If I were BB, because you didn't raise preflop, I would have a difficult time believing the river ace helped you. Seems like an all-in river bluff is a pretty risky move considering how the hand was played.