True. But Louis (by 1673) has buried several sons of his own already (2 by Maria Teresa (plus 3 daughters), 4 boys by La Vallière, 1 by La Montespan (plus a daughter by the last)), all of whom were probably healthy when born. I imagine that he would offer La Mademoiselle out of propriety (if only so that the English can refuse her and to satisfy honour), but I think he would understand James' need for a "spare". Although, I do agree that she's likely to be offered, Louis could probably also offer her more appropriately aged half-sister, the Dowager Duchesse de Guise, but since she's hunchbacked (I think), even if wealthy (I think), I don't know if James will even look twice.