We have a well adjusted , well cared for 17 yr old only who is very responsible, mature and secure.
The comments seemed to dwindle as my answers to why an only continued to be consistent... She is my responsibility to get her out if college debt free. We've saved since before she was born in order to provide that as well as our own retirement.
Sure... I know sine call her spoiled and catered to but she is the Varsity captain of cheer, higher than a 4.0 GPA and a drive that can't be stopped.
We didn't make her that way, she was born into a driven family where failure is no option... She's lived it with us and call me crazy but my house is the one where everyone of her friends end up each weekend to finish school projects, have fun and hang out.
It's all about the stability of the family. We support her 100% + and she knows that.
You can't guarantee a sibling will be a blessing... It can be a very negative effect on the entire family dynamic.
You do what's best for you and don't worry about the unsolicited advice. I've had plenty if unsolicited advice and right now.. We're still on top. No negatives here from a one and only by choice.