I received a call from a customer that also happens to live right behind me. I currently do not do work for her at this address, but i do, do work for her at another residence she owns. She asked me if i would consider raking her pine needles up for free since the are coming from my trees. If i say no i might lose her as a customer for lawn cutting at the other property. If i say yes i will feel like she is taking advantage of me. Any suggestions? The trees were there before she moved in a couple years ago and at 30-40 feet tall i am sure she couldn't't have missed them.