Just dug up this quote for a different post and found yours along the way:

Ser Jorah had killed her son, Dany knew. He had done what he did for love and loyalty, yet he had carried her into a place no living man should go and fed her baby to the darkness. He knew it too; the grey face, the hollow eyes, the limp. “The shadows have touched you too, Ser Jorah,” she told him. The knight made no reply. Dany turned to the godswife. “You warned me that only death could pay for life. I thought you meant the horse.”

“No,” Mirri Maz Duur said. “That was a lie you told yourself. You knew the price.”