A morganatic marriage is one in which the spouse doesn't share the titled person's title or style (although, in many cases, a lesser title has been granted to them), and the children have no rights of succession. However, it doesn't affect the title or style of the partner who was born royal.What exactly is the difference between an unequal and a morganatic marriage?
In the case of Carl Gustaf's sisters, who made unequal marriages, they themselves were stripped of the style of HRH.