Fetch Quest

A married mixed-gender pair of adventurers find themselves pressured by a wizard into retrieving an object from the sanctuary of a cat goddess, which is protected by a barrier that allows only women to pass. It's a dilemma for them to solve in a 21K-word novella in 10 chapters! CW: Forced M2F transformation, blackmail.

Other places to find this, and other shorts & novellas: https://prysmcat.com/tales/