Not sure why Kiara so confidently announced Ame's visit knowing the type of person she is. The most assumed reason it didn't happen seems to be passport issue that she has talked about several times. However, even before that she didn't even acknowledge the trip much, and when she does she made it seemed like it wasn't even 100% confirmed, eg. she asked when were the others visiting and she might consider visiting around the same time, implying she didn't even had a date set yet.Remember when Ame and bunch of JPs were totally gonna visit her in Osterreich?
I'll believe this when it happens.
And to be fair to Mumei, it seemed like the trip was definitely happening but she unfortunately got sick.