annegret raunigk , from berlin , is already a mother of 13 but decided to expand her family further after her youngest child told her : ` i want to have a little brother or sister .
' someone who understands annegret 's position well is britain 's older mother , sue tollefsen , from essex that freya has often asked her mother if she could have a brother or sister and as a result , sue revealed that she did consider it .