Is this normal behavior for her? My mother came through my town and went straight through
Without even telling me. I found out after the fact. The only reason this doesn't hurt me is that I know my mother. This has nothing to do with me. I know she loves me, she's just very into her agenda. It's a quirk I guess.
Try not to take it personally. I used to get hurt a lot but one day I was telling my shrink a story where I felt my mother let me down again. Her reply to me gave me an aha moment. She just said... "why would you expect anything different? "She has shown you over and over again who she is."
I guess I'm asking, has your sister exhibited this behavior all along, or is this something out of character for her?