The landlady, summary

Stella St. 

There once was a young British man, named Billy Weaver. On his way to travel somewhere, his train made a stop in Bath. It was around 9:00 p.m., so Billy wanted to stay somewhere for the night, since it had got late. 

 On his way to a hotel, he stumbled across a house that had a printed notice propped up it's downstairs' s window that had "BED AND BREAKFAST" written on it. Billy decided to give it a shot

 He rang the bell and a kind looking, middle aged woman answered the door immediately, welcoming him in. She gave him a tour but before he could go to bed, the lady asked Billy to go downstairs and sign a paper. He agreed to do so. 

Before writing his name, he noticed that there were only two other names written, which was weird, because the price was pretty low. The two names seemed oddly familiar to Billy, as if those guys were famous or something similar. The lady told him ,that they have been living with her for some time now and that they are young and handsome like him. Billy was pretty curious and asked if there was someone else that had stayed throughout this years. At the end, the lady looked at him and answered: "Only you".

This story leaves me with a lot of questions. What did the lady mean at the end? Why do the two names seem familiar to Billy? Why did the lady accept only young, handsome men? I feel like There should be more in the story to answer these questions.