Oh I tell her no and hold her under the chin when I can. Bella has interacted with and mouthed several people but has only drawn blood on me. It’s clearly my thin skin that is a problem combined with her teeth. She needs to learn no mouthing, none at all. We work on that.Does look painful.
You mention wearing a glove.
Could you grab Bella's jaw as she tries to bite?
Telling her No, at same time same time?