I think I ought to explain: few months back when I was just starting out, I made a certain thread on the same subject, in which you posted a solution. Your solution, I now understand, was to overwrite the “You can’t see “her” ([person]) at the moment” rule. Back then, I got it a bit wrong, and assumed you had simply restated the “you can’t see any such thing” rule, and that somehow, that made things work due to buggy behaviour. Stranger things have happened, and I assumed this was one of those things.
Anyway, I’ve reported the error on the bug tracker, and it stands to reason that the feminine pronoun would be a special case (since “her” can refer directly to a person, unlike “his” and “its”). I still don’t understand why Inform accepts “x her scrotum” without complaint, as long as there is a man in the room with the requisite incorporated object. I find it annoying on a personal level, and in this instance it does seem misleading, but is it a bonafide bug?