My Mom's 89, and has some dementia...but she's been mixing my daughter and I up namewise for years! (Well, we *are* a lot alike...

) She knows who she's talking to...but sometimes the name 'misfires'. Some confusion of that kind is normal as we get older. Also, as 'roles' change it can be confusing for an older person as well. Mom still laughs about the time she told the phone salesman that her 'mother' was at work and wouldn't be home until 5. Since he knew she was in her eighties, he must have been just a little surprised that *her* mom was still working....