Family.
Molly had always wanted grandchildren & her children did not disappoint. The year 2000, Bill and Fleur brought Victoire into the world. 2001 saw twins Fabian and Gideon born to Fred and Alicia and 2002 brought more grandchildren into the mix with Molly II born to Percy and Audrey, Dominique born to Bill and Fleur and Georgia born to Fred and Alicia. There was a break for a few years and then 2006 brought four more grand kids. James Sirius for Harry and Ginny, Lucy for Percy and Audrey, Louis for Bill and Fleur and Fred II for George and Angelina. Three more years of break then Rose for Ron and Hermione, Albus Severus for Harry and Ginny and Roxanne for George and Angelina came along in 2009, followed by Lily Luna for Harry and Ginny, Hugo for Ron and Hermione and Alastor for George and Angelina in 2010.
Meanwhile, Sirius had married Renata and Regulus II was born shortly after Victoire. Their second child Alice came soon after Georgia and their third, Frank, the day before Louis. Remus and Dora had been busy with Marlene, known as Marly, born just after Regulus and Emmeline, known as Emmy, just after Fred's twins.