Cat-sitters in Cardiff

A couple of Australian friends were in England on business and arrived in Cambridge on a Sunday evening prior to an appointment the following day. They decided to go out for a drink before dinner and went into a nearby hotel and requested a beer, This being in the age of restricted licensing hours the barman politely told them that he was unable to serve them until after 7pm as they were not residents. A woman sitting at a nearby table spoke up and, as a resident, asked if she might buy them a drink which they gladly accepted. They asked her how she came to be staying in Cambridge and she told them that the next day she and her husband were removing from Cardiff, and that she had arrived early to receive the keys of their new house. Our friend John G. asked her where she had been living in Cardiff, to which she replied "Bloggs Street" - so he asked her which number in Bloggs Street, to which she replied "number 19". He then asked her if she knew David G. who lived at number 21: "Oh yes" she replied, "we knew him very well. We used to look after each other's cats". "That's my brother", said John G.