In a heinous act of domestic violence, Mr Coldheart beats little Michelle the 2-year-old daughter of Mrs Coldheart from a previous marriage with a belt all over her little body. Mrs Coldheart witnesses the whole incident. Little Michelle is severely injured and hospitalized. Mr Coldheart is subsequently arrested and charged with assault with intent to do grievous bodily harm. The state wishes to call Mrs Coldheart as a witness for the prosecution. Critically evaluate the legal position of Mrs Coldheart as a witness