"No. I would place a spell over you, so where your children are concerned they would have distinct smells and senses, as well as making your vision not see similarities between them and their father. It could be lifted at any time, without trouble, at your request." He wanted her to be happy, and more, to be able to relate to her children, to find them appealing.
Merlin blinked, then smiled a little. "I could do that, if it would be a help? I can assume a scent and appearance to enable them to accept me more easily, as well, if it is necessary." Above all things, help the children, was an old rule of Merlin's. He would help her, and her children, with everything he had.