The years flew by. Molly and Arthur happily playing the part of grandparents, not only to their own grandchildren but to their grandchildren's friends as well.
As more and more Weasley's and Potters entered Hogwarts Arthur had more reason to cheer at quidditch matches. It was an exceptionally talented generation. Although Arthur did have to divide his loyalty between Gryffindor and Ravenclaw, as some of their grandchildren were sorted into that grand house.
Charlie finally had enough of being away and came home to teach at Hogwarts.
They saw Teddy and Victoire finish school and start life. They were married and quickly went about making them great grand-parents. Although, sadly, Arthur did not live to see their birth. The problems that had plagued him since the serpent's bite all those years ago were just too much for his body. He died reaching out for Fred.
It was hard on Molly. He had been her other half. But our Molly is a strong woman and she went on. Andromeda made sure she got out there and did things.
The family thrived. More Potters and Weasleys grew up and started their careers and lives. More great-grandchildren were born.
At age 101 Molly joined her Arthur and Fred, continuing to watch over her family from above.