Be very nice and tell her she can have any she feels like pulling out of your garden.
Thats a lot of work for them to rake it out, barrow it over to thier yard and spread it. I doubt they will go through all that trouble.
You've been friendly, but called thier bluff. Worse that can happen is they actually pull it from your garden and your out the time it took to spread it.
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2005 CRD "
Ol' Blue"
Red Ryder carbine-action, two hundred shot range model air rifle with a compass in the stock and this thing which tells time.
My build page- RL Komodo Rear and TJM Front Bumper, armored, lifted, JBA Steel D30, 4.10s and ARB air lockers.