I'm not really qualified to answer this but will anyway!
I'm pregnant with no 3. I always quite wanted a third, DP didn't, but it happened and now he's cool with it.
The reason I wanted 3 mainly becasue my eldest has special needs. I don't know what the future will hold for her but I should probably work on the assumption that she'll be quite dependant on her family. Anything over and above that will be a wonderful bonus.
With 1 younger sibling I felt that this may prove to be a lot of pressure on my DD2. If / when D and I are to ill or elderly to care for DD1, or when we are no longer around, my DD2 will probably feel she is responsible. A awful lot of pressure for one person I feel.
DD2 may well decide to emigrate, and I would want her to follow her dreams but I have to be truthful and say I'd find that so hard with my eldest having SN's.
My eldest won't have children and again I'd hate to be clucksing around DD2 praying she wants them.
In other words I want the pressure taken off DD2 and basically, long term, it would be nice for DD2 if she had some non-SN support as she grows up, someone to share with checking in on their eldest sister.
Short term -
- there may be times when DD2 is a bit more grown up than her younger sister and it would be nice if she had a sibling close in years to play with as well.
- I think that the 3 will work really well together. I can see DD2 and DC3 really looking after and loving DD1 and DD1 really benifitting from having " sibloings to learn from and play with.
- I look at my 2 girls now and feel so, so blessed I can't wait to make another amazing child and feel very, very lucky that I have that opportunity.