Hey @10TG,
Thanks for posting in the Community!
The account cannot switch itself automatically so something must have happened there; maybe she has used your device and forgot to log herself out?
In any case though, if you log out and log back in using your own credentials, you should be able to continue using your personal account without further issues,
We're here for you if for some reason the strange behaviour continues 🙂
Cheers!
Hey there you, Yeah, you! 😁 Welcome - we're glad you joined the Spotify Community! While you here, let's have a fun game…