Overhanging Trees

need some help.
the lady behind us has some large trees (one of which is a bottlebrush) and there are many branches overhanging into our back yard. it has just been paved and yesterday we bought a nice new outdoor setting just in time for Chrissy. the problem is the overhanging branches. my grandmother-in-law has lent us her trimmer and i've chopped some of them down and back far enough so they won't annoy us, now my question is...
can i throw the branches back over her fence as they are from her tree?? or do i have to dispose of them myself?
the lady behind us has some large trees (one of which is a bottlebrush) and there are many branches overhanging into our back yard. it has just been paved and yesterday we bought a nice new outdoor setting just in time for Chrissy. the problem is the overhanging branches. my grandmother-in-law has lent us her trimmer and i've chopped some of them down and back far enough so they won't annoy us, now my question is...
can i throw the branches back over her fence as they are from her tree?? or do i have to dispose of them myself?