The entire Stephenson family wasn't surprised when they saw Hilda because Daniel might have mentioned to her over the phone that they would be here. He was hinting at her to meet him here.

True enough, she is here for another chance encounter!

However, Hilda was truly oblivious to the fact that the Stephenson's would show up here today. Nathan was the one who answered Daniel's call, and he even jotted down notes and wrote a play from the phone conversation. 

Although Hilda did recall hearing those lines, she was mainly focused on Nathan's handsome face. therefore, she did not know that the Stephenson's would be here today.

Mrs. Stephenson...