As someone has already posted, Marshall Andre Massena took his mistress, who dressed in Hussar uniform on his Portuguese campaign. General Junot’s wife also went to Spain when Junot was part of the Third invasion of Portugal. She was pregnant and at one point was living in Ciadad Rodrigo after the French had bombarded it, then moved to Salamanca.
Napoleon per Andrew Roberts biography, and a few others, didn’t have much use for women outside the bedroom. I’ve written and read fan fiction and the best fan fiction doesn’t change key elements of the main proponents character and behaviour to the extent you are considering.