The issue in your situation is community property. Since NV is a community property state, 1/2 of her NV income is attributable to you, and therefore taxable to you as a CA resident. (CA taxes its residents on all income, regardless of source.)
If you're not sure about your CA residency, see this reference on CA's rules for determining residency status: https://www.ftb.ca.gov/forms/2018/18_1031.pdf
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
