Isis had paid for it with her own money she had left from before she came to stay at the house and was living by herself. xD She didn't have much left, but she couldn't help but spoil her little Cleo.
"Ever heard of recessive geanes?" Osiris asked. "I just learned about the whole DNA thing recently myself... though it must be slightly different fotr deities."
"Oh, well, red hair is a 'hidden' trait that Isis and I apprently both have; that means it's in our blood but it doens't show. For this Cleo, when we had her, she inherited to parts of the hidden trait, which, ah, makes a whole, so it shows up." Osiris paused. "That's the simplest I can make it; if you want more, you'll have to look it up."
"I wouldn't understand it even if I did. And if you and Isis both have red hair, that doesn't show up, then you can stop being so nasty to me about mine."