Why did the speaker go to a cafe?

I had to go to Amsterdam last week for a conference. I arrived at the airport in plenty of time and checked in. But I only had one small case, so I decided to take it on the plane as hand luggage. As the flight was not due to board for 45 minutes, I went to a cafe, sat down and ordered a cup of coffee.
    While I was sitting there, drinking my coffee and reading the paper, I was vaguely aware of a woman and her child coming to sit at the next table. I did not pay much attention to them though. And when my flight was called, I reached for my case and left.
An hour later, the plane was in the air and I decided to look at the conference programme to see what I wanted to attend. Imagine my surprise when I opened the case and found that it was full of picture books and children’s toys. And imagine what the woman must have thought about a case full of men’s clothes and scientific papers.
10. Why did the speaker go to a cafe?
What was in the speaker’s case?
What did the speaker find out on board the plane?