Creative writing - Character development

I have researched the names so they are appropriate for the generation on this website

This story is set in present day however my main character is Mary who at the age of 77 is suffering from dementia.  She was born  1 May 1933. Her younger sister was called Betty and her husband was called Frank.  Sadly Frank passed away one year ago before the dementia set in.  Her younger sister Betty died in a car accident aged only 20 in 1955.  Mary has one daughter born in 1955 called June. June is married to Michael and they have two sons, Robert and Ben.  Mary is very close to her granddaughter Mille who is nine years as she picks her up after school two days and also has her during the school holidays.

Mary and Michael live in a beautiful Edwardian House on the edge of the village where Mary grew up.  The house has large gardens backing onto a wooded glen with a stream running through.  Mary and her sister Betty also grew up in this area.  Mary has been staying with June and Michael since before Christmas since the dementia was getting worse.  The day is 1 May.  The story will be told in two parts.  Firstly, through the eyes of Mary, a young girl running through the woods.  This will describe the day, the woods and will appear to be about a young girl.  The second part of the story will be through the eyes of June who has been frantically searching for Mary for the last two hours.  It is a Sunday morning so Millie is helping her Grandma.   The reader at this point will realise that the young Mary is actually the older Mary…..