I’m 50 and my sister is 62. I told my her about something to do with my health in confidence and specifically asked her not to tell my nephew's. She actually replied with “it’s your health and your news to tell not mine”.
I was gobsmacked to hear my nephew asking me questions about this health condition when we were all sat in a room together. I said nothing instantly because not only was I shocked but it’s not my nephew's fault and I didn't want him to feel bad in any way that he shouldn't have mentioned it.
I messaged her and told her she had broken my confidence and that I was very upset over it. She completely blanked the message and did not reply. Today (three days later) she then came to my area (half hour away) and met up with my nephew and his wife for a Birthday meal leaving my nephew and his wife wondering why my she had not mentioned it to me.
I also know from past experiences similar to this that she will cover my non-attendance by saying “I don't know I haven't heard from her, she's in a mood”.
I'm not in a mood, I've cried for three days and I feel broken, I'm so upset. I thought I had a best friend in my sister. Can anyone please advise, am I being unreasonable in expecting an apology for breaking my trust or should I just let it go. Thank you to anyone who replies and apologies if I've posted this incorrectly. Be gentle, it's my first post.