In this case I suggest her to:
1 - make sure she's logged in her own account
2 - access the desired playlist in your profile (created by her, under your username, correct?)
3 - select all songs (CTRL+A)
4 - copy
5 - go to her profile and create a new, empty playlist
6 - paste
7 - enjoy :)
I have the same problem. On top I don't want to download the songs just the playlist and I'd like to be able to add songs to it. Is there no way moving the playlist from one account to another?
You can copy the playlist's link and then paste it into a new, empty playlist when logged in the desired account.
Does it help you?
@cameleon32, after you paste the playlist link, select all songs and then copy them. Then you'll paste into a new empty playist.
You'll then have the exact same playlist in the account you want.
If you're logged in the correct account, just paste the playlist link in the search tab, press enter and you'll see it.
Then select all songs (CTRL + A) and copy.
Then paste to a new, empty playlist.
You're welcome - please don't forget to add likes and Accept As Solution :)