Deep down Lanark didn't care about his wife. If he had the choice between his wife and the feather he would have chosen the feather happily. But he knows that Borris is going to take his feathers anyway, so at least he could use this moment to get in his wife's good book.
Lanark took out his feather from his pocket, it was quite powerful as it has the power of many feathers that Lanark snatched from demons. Borris's eyes started shining as he saw the feather, for him it was the key to his dream to be the devil. He left Lanark from his hand and held that feather in his other hand.
He took out his feather from his pocket and then, put both feathers in one hand and the feathers started integrating into each other, within a moment both feathers became one. Borris felt his newfound power for a moment, and then looked at Lanark, and hit him with the fireball.