“A tale of somewhat the same nature, perhaps. But more easily believed. Lord Stannis has spent most of his marriage apart from his wife. Not that I fault him, I’d do the same were I married to Lady Selyse. Nonetheless, if we put it about that her daughter is baseborn and Stannis a cuckold, well… the smallfolk are always eager to believe the worst of their lords, particularly those as stern, sour, and prickly proud as Stannis Baratheon.”
[...]
Littlefinger gestured languidly. “A trade envoy from Lys once observed to me that Lord Stannis must love his daughter very well, since he’d erected hundreds of statues of her all along the walls of Dragonstone. ‘My lord,’ I had to tell him, “those are gargoyles.’” He chuckled. “Ser Axell might serve for Shireen’s father, but in my experience, the more bizarre and shocking a tale the more apt it is to be repeated. Stannis keeps an especially grotesque fool, a lackwit with a tattooed face.”
Grand Maester Pycelle gaped at him, aghast. “Surely you do not mean to suggest that Lady Selyse would bring a fool into her bed?”
“You’d have to be a fool to want to bed Selyse Florent,” said Littlefinger. “Doubtless Patchface reminded her of Stannis. And the best lies contain within them nuggets of truth, enough to give a listener pause. As it happens, this fool is utterly devoted to the girl and follows her everywhere. They even look somewhat alike. Shireen has a mottled, half-frozen face as well.”
Pycelle was lost. “But that is from the greyscale that near killed her as a babe, poor thing.”
“I like my tale better,” said Littlefinger, “and so will the smallfolk. Most of them believe that if a woman eats rabbit while pregnant, her child will be born with long floppy ears."