I would say situation 3 would indeed work however not situation 2. In 2 it says she may not attack if she already did. She did (it does not matter if the matrix is own her or not. In 3 there is nothing on her card preventing her from attacking again. I would say if you did indeed have the resources to undeplete her (3?) and attach to the matrix(2) and then attach to someone else (2) and then attach back to her(2) then you can do it, but if you have that many resources hopefully you can do more than that.
You either discover a star or you don't, you arrogant punk.