can here be a marrage in blender? like if a force is applied to one object the other object would move too but the force would be higher to have to push 2 objects. and if it hit a wall the object without a force would stop the one with the force. like a very good marrage 
maybe that can be acomplished in a newer verson?
maybe this will work…
lets say for arguments sake, the one pushing two objects is the wife, and the one pushing one is the husband…
wait a sec…this is too complecated to explain in this post…ill email an example file to ya! Press uparrow to move the spouces…R to restart…hope it helps! 
:o :o dude…it wouldnt let me send it to you…well…er…just email me then, and ill give it to you…by the way, its [email protected]…
no no this isn’t like a real marrage at all they both r equal…could u do that in blender? oh and u know that dynamic sphere right? well is that filled or is it empty so u can put another dynamic in it?