I was only a child until 2001 when my sister was born, what about you?
I have one older brother and a younger sister.  Did you like being an only child?
Only child
An only child is a person with no siblings, either biological or adopted. 
Children who have half-siblings or step-siblings, either living at the same house or a different house - especially those who were born considerably later - may have a similar family environment to only children, as may children who have much younger siblings from both of the same parents (generally ten or more years).
Overview.
Throughout history, only children were relatively uncommon. From around the middle of the
When my grandmother was asked how many children she had, she said: 'One.' She had nine daughters and one son. She said the same about our family. That we only had one child. 'What about us?' my sister and I asked. 'You are going to get us little sons,' she answered. It made me desperate. What was I supposed to do with my life on earth? Giving birth to little sons! Becoming a son factory. I was nine years old