Thank you, and she sobbed
The puzzle
A man said thank you.
That was all, and the person beside him broke down in tears.
See the answer (spoiler)
Spoilers from here on. If you want to work it out yourself, leave this folded and move on.
Answer
She had been caring for him for years.
He lost his speech in an accident, and after a long rehabilitation those two words were the first thing he managed to say.
