an "insulting compliment"

It happened yesterday when I was walking in the rain from the yeshiva high school where I teach to the bus stop where I can get rides to Ofra and home. It's a good few minutes' walk, so when a young woman offered me a ride, I readily thanked her and got in the car. She said:

"I remember when I was pregnant how even a short lift was helpful."

Oops!
Now, did she think I'm pregnant? Am I that fat?
That's an insult!

But if she thought I'm pregnant, then she thinks I'm young enough to be pregnant.
Ahhhhhhhh...
...to be thought of as that young... is a compliment!