She didn’t expect someone who liked Betty to pop up at this time.
Could it be that this was the person that had been involved in Betty’s behavior all this time?
After all, according to her mother, this man was a neighbor twenty years ago, and how old was Betty twenty years ago? Just six years old, right?
Then that Lucas was probably not much older, at most ten years old. Did a ten year old understand love?
Furthermore, both families had been separated for twenty years, and Betty and Lucas hadn’t seen each other for twenty years, so would he really like her?
Even if he was precocious and understood his feelings at the age of ten and fell in love with Betty, then why didn’t he come to Betty earlier, instead of coming after a twenty-year interval?
And the timing of this person coming just happened to be so coincidental with Betty’s change, so it was highly likely that was related to this Lucas.