Hello tntboy632, it's very nice of you to help your sister write her appeal...
This wasn't the first time your sister had griefed on the server; it was the 5th time. If she truly didn't know what she was doing, I wonder why there's such a gap between her prior 4 bans which were from grief traps; at least a month in between them and no other reports of grief from players. This means she was picking the places to grief carefully. I'm not sure I believe that she didn't know what she was doing.
Furthermore, if she doesn't know what she's doing well enough to refrain from griefing, how can we be assured that she'll know enough about what she's doing to follow the rules once allowed back on?
I am also very, very sorry for the deep emotional impact this ban is having on both of you; unfortunately crying doesn't bring back people's builds.
If you can perhaps explain to me how you'll help your sister understand what our rules are and how not to grief, then I'll consider pardoning her.