Creating points using Grasshopper that can adjusted in Rhino without baking

I am trying to create a grasshopper script that:

takes an input figure (collection of points and connecting lines) and defines another figure (via some geometric algorithm/mapping.)  

And then allows the user to manually alter the geometry of either figure in the rhino window and the changes be reflected in the other figure (by applying the forward or back mapping depending on which figure is manually changed.

An example is:

(1) User inputs figure A --> Script creates A* (via the forward mapping)

(2)User moves point in A --> Script updates A* (via forward mapping)

(3) User moves point in A* --> Script updates A (via back mapping)

With grasshopper I can easily do (1) and (2) but I am unable to do (3)

Any help would be appreciated.

I guess my question is essentially: is there a way to create points using grasshopper which are points in Rhino (without having to bake them out?) Or would something like RhiniScript be able to do this? (I know next to nothing about rhinoscript so may be way off beam here)

Thanks