I have this crazy notion that I do n't have enough time . What this does is cause me to plan and re - plan so that I fit all of my interests and goals into my life . We talked about having another child and I confessed that my greatest fear was that we would n't be able to .
According to the above context, answer the following question.
What may be the reason why they do n't think they can have another child ?


They 're too old .