After holding his two daughters, ages two years and six months, in his arms one evening, Dudley begins to think about the last two generations of his family, and vows he won’t let these two end up like his mother and his aunt, or like himself and Harry. He won’t. These girls will be sisters and friends, draw on each other as a source of strength.
As a reminder of his promise, he gets two tattoos the next day - a bunch of petunias on the inside of one arm, an array of lilies on the other.
When he hugs his daughters, they’ll feel his love through both.