I would like to ask a question ?

I am DID and until recently had no real
issue with my little one Sherree some will know the spelling as
(sherrri) that is how she writes her name
Sherree is 6yrs old and has been hiding in her cupboard
only coming out for those she truely believes are worth her trust
at least that is how I and T see it recently however she has
taken to calling me mummy and I do not understand this
is this something that has happened to others or is it just me
and mine being "strange"
Thank you for reading this