Originally Posted by DigificWriter
Given Mystique's characterization in the films, I can very easily envision a scenario where Kurt is born 'normal' and Erik convinced Mystique to kill the child by abandoning him to die through exposure to the elements, only for the Wagners to find and raise him, with his mutant powers and abnormal appearance only later manifesting themselves.
That would make both characters incredibly stupid and rash. The prior films made it clear mutations usually manifest themselves at puberty. Magneto and Mystique should know this.