Al tarbe sicha im haisha, perhaps?
In all fairness, ISTM that “al tarbeh…” falls more under the category of “advice” rather than halacha. I’m not aware of any siman in S”A that discussed how much one is allowed to converse with one’s wife, what topics are permitted/forbidden or anything else that is usually defined in a halachic matter.
The Wolf
Wise people usually follow the advice offered by a Mishna, perhaps?