"Our positions are different.

However, if you choose to be ungrateful you must." And she walked away, leaving Hetty sitting alone reflecting sadly on her words.

So after all it was not kindness and liking for her that had made these people include her in their invitation.

It was only the desire to have their party made more amusing by her performance.

She wished she could do what was required of her, so that she need owe them nothing.
But she could not; and how hateful she must seem.
All her pleasure was over now, and she was glad when the moment came to get away.