A (t͟r͟u͟l͟y͟) kosher kitchen and the laws of Family Purity [do not be afraid and don't be embarrassed to tell her this - as it is on my responsibility a͟n͟d͟ i͟n͟ m͟y͟ n͟a͟m͟e͟ and ultimately will succeed.] and explain to her that the main thing is keeping them i͟n͟ a͟c͟t͟u͟a͟l͟i͟t͟y͟ although its not understood (like with physical healing), and even when t͟h͟e͟y͟ a͟r͟e͟ s͟a͟y͟i͟n͟g͟ that they don't believe etc. It does not change the reality (that they truly do believe)."

(Free Translation)

- Shmiras Hakashrus, Page 223