Hi there, @mulineman. 👋
Looks like you've been in touch with our User Support team via email regarding this issue.
I do see that her account is upgraded through Apple. She will need to cancel her own Premium subscription through Apple and wait for it to expire before joining your Premium Family plan. Once it expires, she can accept the invite you sent over.
You can help her cancel the automatic renewal using these steps: Manage subscription: Apple (iTunes)
The short answer is no, she won't lose her collection, stations, playlist, or Thumb feedback.
When you downgrade from Pandora Premium to Plus or ad-supported Pandora, you will not be able to access your on-demand music collection or custom playlists. However, your collection and playback history will be stored in our servers for when you return to Premium. In the meantime, you will have access to all the stations you've created and any podcasts you've added to your account including all Thumb feedback and added variety. This also means there will only be a brief interruption in her service until she joins your Premium Family plan.
Hope this information is helpful. Let me know if you need anything else. 🎧
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