I think we need a picture, as this makes no sense to me.
It sounds to me like you both own a 'paved garden', but also share a paved 'drive'?
You cannot have 'my side of the shared drive'. It's either shared, or it's not. And if the drop curb is on one side of the drive, then obviously that's the side that will need to be used when entering and exiting the 'shared drive'.
This makes no sense to me.
Picture showing the land you own (your garden) and the land that's shared (drive) please. Does she even actually drive on your land, or just on the side of the shared drive, that you perceive to be 'yours'?