She was in rehab for 2 weeks after surgery and at her home for 1 month during home health PT. We took her to our home for 1 week, then took her back to her house. She is not recognizing her home as her own, she says something is not right. She can function fine in her home and is oriented but insists she is still at our house. She has not been diagnosed with dementia or any cognitive decline, she did have some trouble with time of day after naps prior to surgery. What can be happening?