writing

Dad and I were trying to get Mom to write something yesterday. I said, "Write what you are thinking." And she did:
what you are thinking
what you are thinking
what you are thinking
and she handed the paper back to me.

So Dad gave it a try and told her to write something about me. She wrote three words again and again. It said, "I'm (a three syllable unintelligible word), butt"
We tried to decifer the middle word with no luck. It was spelled differently each time, but always had three syllables. She had "greet" in there and "fur" and "gat" and I couldn't make heads or tails of it. So I said, "Ok, let me watch you write....do it slowly." So she wrote carefully and slowly while I read aloud.

"I'm gettfull, ....t ....butt."

I turned ashen and said, "She's writing,'I'm forgetful, but." She nodded yes. I just smiled at her and said, "Yes, you're forgetful, but that's ok." and Dad said, "It sure is." The blood drained from my face and Dad was stunned. It would be better if we thought she had no clue what was going on, but now I think she does at least a very little bit and it makes me sad for her. But I don't know what to do.