This one's a sort of unofficial sequel to Firewhisky and Frumious Gripples, so you'll want to read that first or it won't make any sense.
He'd said that they had to adapt to the new order of things to preserve what was most important. The girl was close to Potter. A war hero. He was just using her. It was for the good of the family. Even Lucius had been forced to agree in the end. Narcissa'd had her doubts. It was too great a sacrifice for her precious son to make, but he had insisted upon it.
At least the girl was a pureblood - true. And such lovely blonde hair. Narcissa consoled herself with the thought of all those pretty blonde babies. When she looked at them, she couldn't see their mother at all, and that was as it should be.
She watched her son raise those pretty Malfoy babies, telling them stories just as his father had done before him, and sometimes she thought that everything was just as it should be. Babbitty Rabbitty hopped and cackled again. But then there were new stories, too, about great invisible giants that played tiddlywinks... and sometimes Narcissa began to wonder.