L.S.
Giving you child a sibling is the best gift in the world. Not only will they have someone else to play with all the time but they will also have someone extremely close to to confide in their entire lives.
I am a 40 year old SAHM with two small children ages 3 and 5 and not only are they brother and sister but they are best friends as well. They play together all day long, be it cars, barbies or riding their bikes. They have the best time in the world. I don't think it would have been the same had we stopped at one child. Believe me I didn't want to have my two so close together in the beginning but it has definetly paid off in the long run. Plus my 5 year old son explains things to his sister if she doesn't understand when I am trying to pick up around the house or cook a meal.
Hope this helps.
L. S.