Why didn’t my sister congratulate me on my new job?

Anonymous
I qualified for this position with Appen Butler Hill recently (we help Google improve the search engine) and I told her via WhatsApp as she messaged me to thank me for giving a present to her son for his birthday but I didn’t even get a congratulations out of her. She totally blanked me. Now, she homeschools and is a stay at home mom so she is busy but it’s basic decency to say well done or congrats right? She is a born again Christian and she has been out of paid employment for many years. I don’t understand why she didn’t wish me well. We’re not super close and I only see her now and then but we’re not enemies either so I don’t understand. What do you think?
Why didn’t my sister congratulate me on my new job?
10 Opinion