Why hadn't she wanted to tell him about her sister?

I know, because he's always talking about you and your sister.

The same cannot be said, however, about her sister or second son.

Now he was talking about a brother or sister too.

"And so from one of those you learned something about my sister that she would want to tell me herself."

"I am just coming to see that you don't know the first thing about your sister."

That he had learned about her sister through past and present news stories.

Please, you must tell me about my sister - and the rest of your family.

"There are things you do not know about your sister."

I told him about my sister who now had no legs.