Jimmy doesn't mind at 23 sharing his birthday with Maw Maw, although it was hell as a kid, when she had lots of friends and he none. When he turned 18, in his impertinent Goth period (alias 'Drakkar Noir'), she 'finally' felt able to throw the Chances trio out of her home, so they had to grow up suddenly, seeking real job incomes supplemented by devious ways to skin the supermarket. Five years ago however, her mind went, so they got the house back with her as senile resident hazard.
Spoilers ahead. Coverage follows the scope labeled below.
Complete story — includes the ending
As Maw Maw and Jimmy prepare to celebrate their 86th and 24th birthdays respectively, Jimmy tells Hope about the time when he was about to turn eighteen. The flashback reveals that Jimmy used to be goth, how Maw Maw became senile, how Shelly got her dead tooth, Sabrina used to have braces and was in love with goth Jimmy, Frank was good at his job, Barney used to be obese, and the innocent comment Shelly made about a boyfriend which set Lucy down her murderous path.