In an essay written by two nameless authors speaking in plural first-person narrative, how would one refer to a single one of the two authors? For example, suppose Alice and Bob are the authors of the following, but the reader is not expected to know Alice or Bob's name:
We went to Mexico for our honeymoon. _____ [Bob] had never been to Mexico.
It could be written:
We went to Mexico for our honeymoon. Bob had never been to Mexico.
But that doesn't work because the reader doesn't know Bob's name yet. (Here, it's pretty obvious to the reader from context, but in another situation it might not be.) It also seems to imply that Alice is now speaking for herself in singular first-person.
We went to Mexico for our honeymoon. My husband had never been to Mexico.
That doesn't seem right either, because "we" conflicts with "my," again changing the sense of the narrator.
Is there a clever grammatical resolution to this?