There will be no temptation in heaven, there will be no sin.
Do you have Scripture saying that spiritual beings do not have temptation? Only the Lord is perfect. The Ten Commandments have an internal/spiritual meaning, like Jesus saying adultery including lusting in the heart...
We cannot say that for sure, as we know the Devil and other angels sinned. I would simply say that the saints in heaven would not sin, even if they could, for those and glory of those who fought sin here on earth, against the world's flashing the devil. And having now been freed from those three plagues, that will not be deceived anymore by the pleasures of sin which but for season, you want to grovel in its sewer now that they can fly like an eagle. To God be the glory, and how I wish I could live without sin every day but to the glory of God.
However, DaveMSmith belongs to occult led by a man vainly "puffed up by his fleshly mind" and who almost makes Joseph Smith looks sober, and with whom we have dealt with before: http://www.freerepublic.com/focus/religion/3023264/posts?page=118#118 (and see links)