Afraid that ayu will stop singing...

[HanabiChick]

If Ayu says that she'll continue on as long as she can, then she'll probably try to keep to that promise as much as possible. She will probably have to give up her career at some point though, like most singers anyway, and she could move on and do something else. She loves music though, so she might end up still working in the music industry doing something else. This really doesn't seem like an ending at the moment, it seems like the beginning of another journey so it may not be something to worry so much about. You never know what happens, sometimes things just work out in unexpected ways.