YouTube Music Family Account and Google Home Devices (whose account it uses for music)

So I have a Google Family Group setup and we have a YouTube Music Family account. My daughter who likes to listen to music when going to sleep tells our Sonos speaker (which supports google assistant) to play Music for her. Is there a way to change whose YouTube Music account the music comes from? (ie it will only play songs she likes?)

My SuperMix has now become full of Taylor Swift / Sabrina Carpenter music since it thinks that is what I listen to now, but in reality that is what my daughter listens to when going to sleep.