plus30 and others who aren't sure whether or not to have two children or not.....Please do not listen to those like mog who are 100% sure that all siblings love each other. This is NOT TRUE.
The ONLY reason to have another child is because you and DH want another child. Do not ever have another one because you want to give your first born a sibling. Of course mog's kids will always be perfect together....(sarcasm here), ...seriously I hope they are, but this is not a guarantee.
If you have another child and they get on well, well that is absolutely great. If not, you will (maybe only deep inside) resent the second one, or maybe the first because they don't get along, and I'm sick and tired to parents expecting their kids to take care of them in old age. I think that is a terrible reason to have children in the first place.
I'm an only and I truly planned to expect to care for my parents when they became ill and elderly and I gladly did, but a big reason for this is that I never, ever heard them tell anyone that they expected me to do this. They wanted me to grow up, find somebody special and have a happy life. They also never asked about grandchildren, and it's too bad they passed away before they got to know DD, but so many people are unhappy because they do what they think they should do, or what others tell them to do. My parents led by example, and I'm grateful to have had them. My mother was a happy person and I've never been disappointed that I'm an only.
People can't predict the future...well maybe mog can..but most of us cannot. My father was 32 years older than my mother. Guess who died first.
I feel sorry for all the insecure people who have other children, or children at all, because of them worrying what other people think. Trust me, no one can predict the future.
Nothing is 100%, but so much of the time when parents act like their children 'owe' them things...like talk constantly about how they will have to take care of them when they get old, or care for siblings, etc., those kids grow up resentful.
Again, please do not have a second child to give your first child a sibling. This is really sweet if they get on, but my DH and his brother have always disliked each other and MIL has spent her entire life saying, 'well I wanted to get a divorce when my first was in school, but I knew I had to stick with it long enough to give him a sibling'...And the firstborn (my DH) is an overachiever and very successful, but his brother has always demanded we give or loan him money. When DH quit with the money thing, neither the brother or his mother have ever spoken to him again.
Somoe of you might think this is a bad outcome just because MIL said that, but so muchof the time, siblings still don't get along, despite the best parenting.