I think Napoleon V deserved the satisfaction of asking for a divorce, not his cheating wife.If the Second French Empire collapses during the CEW, I can imagine Her and De Gaulle going to exile (perhaps in Germany) and raise the two girls together.
Of course, in the immediate aftermath, the entire royal family is going to flee (Mostly likely to Britain). I would be really satisfiying if Her broke up with Nap V and fleeing with De Gaulle.