In light of the circumstances, either alternative was open to consideration. Because she didn’t appear to have anticipated the occasion, he wasn’t surprised by the fact that she hadn’t made any preparations. It is possible that his mother assisted him in preparing this, and he was aware that this would come as a surprise to his date.
The second choice, on the other hand, is not an option that can be taken. According to the story, the mother stayed even though she was supposed to leave during the dinner, and she continued to eat. In the event that things do not proceed as anticipated, I will have to have a discussion with my mother.