1. In Season 1, Claire saw a psychic who told her that when he saw her on the first visit, he saw something "blurry" and that "blurry" is bad. Smoke is "blurry."
2. On her second visit to the psychic, he tells her that, "It's crucial that you yourself raise the child. This child parented by anyone else, anyone other than you. Danger surrounds this baby. Your nature, your spirit, your goodness must be an influence in the development of this child. There is no happy life. Not for this child. Not without you. There can't be another. You must not allow another to raise your baby. The baby needs your protection. Great danger will befall." The psychic is forseeing that Aaron will become the black smoke monster. Luckily, Jack created the flash sideways by setting off the bomb and created a reality where Aaron is raised by Claire.
3. The smoke monster in Locke's body protects Kate from Claire and goes out of his way to comfort her. He feels love and tenderness for her because she is his mother.
4. The smoke monster in Locke's body explains to Kate that his mother was crazy and that resulted in "growing pains, which could have been avoided had things been different." Kate asks why he's telling her this and he explains because "now Aaron has a crazy mom too."
5. The smoke monster, in Locke's body, took care of Claire for the three years she was alone on the island because she is his mother and he loves her.
6. The smoke monster spares Kate's life several times throughout the series because she is his adoptive mother and he loves her as well.
7. The smoke monster lies to Claire telling her the Others took her baby, rather than Kate, because he loves Kate (his adoptive mother) and doesn't want Claire to hurt her.
Blah, blah, blah.....