She is Japanese Wolf, so thank goodness I don't have to see her very often. Mr.Sam adores her, and suspects I " have my reservations " but I am unendingly polite to her. She is his senior by 8 years. But I refuse to call her Older Sister ( as they do ) , she is not my sister, she is a know it all. I could go on and on and on.
I read your answer, initially, as she is a Japanese Wolf
I have one brother and one sister-in-law who I love very much (I have to say that as he is an AB person) but I hate anyone in my house for more than a short time. Thankfully, since there three foot of cat hair all over, I don't get many visitors.
I haven't been to visit them for a few years. Mostly due to my ongoing mental health 'issues' and the difficulty in getting the cats into a cat hotel.
Good luck in your attempts to deter 'older sister'. You could take ill and retire to your bed with your laptop. :-D
I feel kind of sorry for her in that she is coming all the way from Japan (I presume). Can you not just swallow it and tolerate her for a little while?