She is still a fiancee, so she is not his legal wife yet. The thing not mentioned is what family and political faction she is from. It would be difficult if a highly ambitious and politically-savvy bride is with the opposition. Thankfully, the mother and two siblings are still alive. And if they don't die, then inheritance goes to the next oldest sibling if the MC didn't leave a will. But can an MC die when he is the character in the story title?