I don't know for sure but I don't think that there will be sin in heaven. For one because we will no longer be tempted and lied to by the enemy. Also because we will not any longer war with our own flesh, as we will be resurrected with new bodies that are not slave to sin, or limited to the love of this world.
I don't think that sin won't exist because it is impossible, rather that it won't exist because we will choose not to.
This is pure speculation, as I have not provided any scripture to support this. I figure I'll know when I get there. I have a hard enough time with the day to day battle with sin, I won't worry about whether or not the battle continues in heaven till I get there.
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Saved by an incredible Grace.
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