mint,
Saw your post on your wondering why they say that having one kid is lonely.
Actually, this is true for my kid. She has cousins to play with since young, but it's not the same. I think she wanted someone she could call 'mei mei'. She felt kinda envious when my nephew called his brothers 'my di di' and felt left out when she called them 'di di' as well and others told her she's not their sister, but cousin.
She didn't mind a one-child babyhood and toddlerhood, but when she went to school, she kept asking me to have a baby sister for her.
I'd wanted to give her a sister actually, but for some personal reasons, I didn't plus the trauma of the first c-section experience haunted me no end.
After an eight year break, I had another baby and she was overjoyed. Although she is occasionally unhappy that my attention cannot be on her all the time now, but she is willing to compromise on that for a baby sister.
A friend who is a single child told me that now that her parents are old and sometimes sickly, she feels quite alone in coping with the financial and emotional burdens.
In giving my kid a baby sister, I hope that next time, she can have someone else to share these burdens, even though the age gap is quite substantial, but at least, there's another person on the face of this earth who she knows is related by blood to her.
I think boy and girl tend to grow apart when they grow up, but girls tend to become closer as they age.