Lady Florence Crawley was always told that she was never like the rest of her family. When the family's new chauffeur arrives Florence is forced to make a difficult decision, her family or the man she loves. Tom Branson x OC (Season 1 - movies)

14 year old Sybil Branson on her birthday

One of Lady Sybil's old suitors comes back to downton to find she is married to Tom Branson

Sybil and Tom run off to Dublin after the scene in the sitting room. 15 yers later, Sybil's daughter and son meet Mary's son, not knowing they are cousins.