Theory:

     The old lady sank down into a chair and laughed a little, then cried a little, then did both together. This made her feel better and she said, “Tom, what a turn you did give me. Now you shut up that nonsense and climb out of this.”

     The groans stopped and the pain vanished from the toe. The boy felt a little foolish, and he said, “Aunt Polly, it seemed dying, and it hurt so I never minded my tooth at all.”

     “Your tooth, indeed! What’s the matter with your tooth?”

     “One of them is loose, and it aches perfectly awful.”
Explanation:
 
The old lady took a breath; she consoled herself a little by laughing and crying. She turned to Tom and said she had almost fallen for it and that Tom should stop this and come out of the bed.
 
Tom felt stupid and said to Aunt Polly that it was his tooth which was painful.
 
Aunt Polly felt something was not right. She guessed that Tom was trying another trick. She asked him if he was pretending to have a toothache next.
  
Tom continued to say that the tooth was loose and painful.
 
Meanings of difficult words:
 
Numbers
Word
Meanings
1.
Indeed
Response confirming something already suggested.
2.
Foolish
Unwise.
Reference:
State Council of Educational Research and Training (2018). Term-1 English Standard-7. On Monday morning - Adapted from The Adventures of Tom Sawyer by Mark Twain (pp. 18-21). Published by the Tamil Nadu Textbook and Educational Services Corporation.