Thanks @N F C It's the first time she has ever done this with him. Even DH had commented "what's she doing following him around?" and then had ordered her to leave it! She walked away but went back to following him. It was if she couldn't leave him alone.
There's an older man I know that swears his cat has saved his life more than once. When his blood pressure suddenly plummets, the cat goes to his wife and fusses at her until she goes to check on her husband.
Animals are amazing!