Anger if she is referred to as anything except "Mummy"..

..and yet, the norm has become (for Olga) to call me "Omran" in front of Dunia (rather than "Daddy" as per the previous norm)

As Dunia headed out for her walk with Olga moments ago, she said "I love you Daddy" as she hugged me..

As a result of Dunia's comment & action - and in a complete contrast to the emotions Dunia expressed - Olga gave me a look of disdain and jealousy.