I contacted Amazon, and it was confirmed that the packages were delivered, but refused by recipient. I decided to send an email to my sister:
"Hi (Sister),
I sent packages to (nephew) and (niece), and received confirmation that they were delivered on 12/18.
Yesterday, I was informed that those packages were returned as undeliverable. Did I send to the wrong address? I sent another package to your family, with some treats. Did you receive that one, or did your neighbors eat it? I'm confused. I have been struggling with this concern for (niece and nephew), always left out of every family occasion. I thought it would be nicer to give this year, than to exclude them again. I shopped carefully, looking for gifts that were neutral but fun and useful. I really do love you and your family, and want you to know that we care a lot about your kids and their happiness. If you will accept them, I will send the gifts again. I hope you will consider sending me a reply to this email, either way. Sending our love to you all, Faithful Witness" Quite honestly, I do not expect a reply. I may follow up with a phone call. I know she is out in service right now. Thank you all for your replies. I know I'm making a fool of myself, but I agree with Xanthippe. I am done being controlled by the JW's.