At first , Charles II opposed the alliance with the Dutch ruler-he preferred that Mary marry the heir to the French throne , the Dauphin Louis , thus allying his realms with Catholic France and strengthening the odds of an eventual Catholic successor in Britain ; but later , under pressure from Parliament and with a coalition with the Catholic French no longer politically favourable , he approved the union .
He wanted Mary to marry the heir to the French Throne , the Dauphin Louis , instead .