Did you ever want more kids?
What are the pros and cons of an only child?
I'm going to answer this as a Mom. I have a daughter, an only child. I called her my little house on the water because 24 years ago, insurance did not cover IVF. She cost over 50k just to conceive and I couldn't afford my house on the water anymore.
When I was pregnant I asked my mom if it was ok to have only 1 child. Her reply was, "Do you want my opinion or my Mommy answer?". I asked for both. Her Mommy answer was you should always have 2 or more so they have a companion, family, a playmate and if anything were to happen, you still have a child left. (Side note, I had a brother who died at age 7, 2 years before I was born) Her opinion answer was if you have a girl, you can stop. I had a girl. I stopped.
Wouldn't change it for the world. She always wanted a sibling, I got her a dog instead. She knows if she wasn't an only child, she would not have been as spoiled as she was. Don't get me wrong, she is NOT spoiled rotten, but she lived a very charmed, BOCA RATON childhood. She was able to do things most adults have not done yet and she is very grateful.
A con of an only child is you have to entertain them; they get lonely unless there is close family, cousins, friends that they can play with (another reason for a dog!). They may grow up to be a little selfish, not knowing how to share, because they never had to. She started day care at 3 months so she learned those things quickly. Other than that I can't think of any.