Do you find it selfish for a couple to have another child after 10-15 years?

Being raised as an only child for practically your whole life and suddenly ''oh your new sibling'' as if you're suppose to be celebrating and happy about the news. Why couldn't they give you a sibling during your younger years when you were 2-5 years old for instance? Why after so many years?

Do you find it selfish for a couple to have another child after 10-15 years?
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