Doubling up

I was away on business Tuesday night and Wednesday night. I put May's pill box on the dining room table and told her I would call her when it was time to take a dose. I left on Tuesday afternoon and called her when I got to California. The pill box was right where I left it and she took her two pills. 

I called her again on Wednesday morning and the pill box was not where it was supposed to be. I hung up while she searched for it. When I called back in about ten minutes she had the pill box in-hand. I told her to find Wednesday morning and take out those pills. She said that compartment was empty. I told her to check Wednesday afternoon--that compartment was empty too. They were loaded when I left. I told her not to take anything that day. 

On Thursday, I called her from the airport and told her to find the pill box--she didn't know where it was. I told her not to do anything until I got back. I arrived home about 2:30, found the pill box and gave her the morning dose. About 8 o'clock that night she said, "Shouldn't I be taking more medicine?" I told her to get the Thursday evening dose from the box upstairs. She came back downstairs with the right pills in hand. 

Before I went to bed I moved the pill box to its normal place in my office and noticed that both Friday compartments were empty. Somehow, between 2:30 in the afternoon and 10 o'clock that night, two days worth of medicine had been removed from the box. I know she swallowed two of them, and she either swallowed the other two or put them down somewhere and never got back to them. And that was the second time in three days it had happened. She has no recollection of how it might have happened.