This is the first villager that wants to move, she told me she was moving today. My question is, today is her last day or tomorrow she will be on boxes?
Beware of a glitch that players are experiencing now with regards to inviting villagers from other islands.
If, say, a friend comes to your island to adopt this villager when she's in boxes, your friend may be stuck with a glitch where his/her game registers their house plot as sold, but there is actually no villager attached to the house. So the house plot remains in limbo. The game sees this as an event in progress and, at this point, you can't do anything to solve it.