My sister was my brother last night

Mom seemed very confused last night, more than usual.
Just before she went to bed, she asked me why the man hadn't come to visit or called.
I asked who she meant because we have no visitors who are men.
She said the teacher who lives downtown.
I just couldn't figure out who she meant.
Then she said the man was my brother.
I told her I have no brother and asked her if she meant my sister who teaches and she adamantly said absolutely not. She just could not think of his name and she was so ashamed that she couldn't remember. After a long discussion and me trying to unravel the mystery of who she was trying to remember, it finally came to her that indeed it was my sister she was trying to remember.
Martha had called earlier that evening to say she wasn't up to visiting today and maybe she would drop by tomorrow.
Mom didn't remember that conversation at all. The conversation that was held only a couple of hours before.
And she absolutely couldn't remember Martha's name.
Martha hasn't seen Mom in a week. When she came this afternoon after school, Mom recognized her right away and came to tell me we had company.
I think Mom couldn't remember Martha because she hadn't seen her in so long. It's Martha's decision about how often she comes to see Mom, but if she continues to only see her once a week, I believe there will come a time when Mom won't recognize her. And that time might be fast approaching.
Although Mom's decline is not fast moving right now, I keep noticing little things that she could do before that she has trouble with now. And I think about when she was diagnosed in April and how quickly she has changed since then.
Yes, God is whispering to me that I can't change Martha or how she handles this situation. All I can do is love my Mom and let Martha handle this her own way.
Gee, does this mean I must stop being a control freak? Yep, I think God is making His point hit home.