When Rory met the Roberts family, Frank and Claire were just married. She remembered thinking that Claire is too young to be the mother of a twelve-year-old. And she came to know that she was not his birth mother only after a week.
Rory learned a little about Liam's mother Brigetta. Liam's mother and his father were childhood sweethearts. They were always together and everyone knew that they would end up together. They had Liam when Frank was just twenty-one—when they were still in university.
They married when they knew Brigetta was pregnant, but she got sick during pregnancy. Rory was not told what kind of sickness, but Frank quit his studies to come to live in his parent's home because Brigetta needed constant care. Grandma Roberts took care of Brigetta and Liam was born in this house.