Overthinking?

The developments recently though got her thinking: was it possible that the records were lying? Was she really just the only child of her birth mother? Could it be possible she had a twin or a half-sister she did not know about, that no one she knew knows about? The coincidences were right there so she wasn’t crazy taking the line of thought she was taking. Who could have known that as a student in London she would be solving mysteries of a girl who looked just like her?