After several no-message calls, I finally answered the call and spoke with a very nice lady named Roberta, who was calling in response to a post card I had filled out in response to an ad offering a free Walmart gift card in exchange for inquiring about their insurance. It turns out that to get the free gift card, I have to agree to allow an insurance salesman to come to our home (my wife _hates_ that), where he will undoubtedly try to pressure me into buying an insurance policy that I cannot possibly afford. I told her to forget it, because we don't want sales people coming to our home. I do not expect any more calls from them.
I am a single lady and I get these calls all the time from this number. I am never home to get call and no mesaage is left. I called back and got a voice mail box, only stating number no name. I have learned to just delete number. I hope I was of some help to let you know your wife isn't the only one getting these calls.