An old trick by ex-spouses receiving alimony is to avoid remarriage while enjoying all of its trappings with a new beau. That’s why divorce settlements often include clauses that can stanch the flow of cash upon a showing that an ex is shacking up.

A state appeals court on Thursday offered some guidance on the quantum of evidence needed, ruling that staying at a lover’s house a couple of nights a week, keeping some clothes there and occasionally receiving the odd piece of mail there does not cohabitation make.