A Noble's War

TLDR A Noble shows up and offers to heal your dieing mother for marrying him. You, a commoner, are the child of a dieing mother and a blacksmith father. You live with them and your two younger sisters. Your mother has, as far as the locals can tell, cancer. Late stage cancer. The only way to save her is to pay a cleric. To pay one you need money. Money you don't have, nor can you get. You, your two sisters, and your father were praying for a miracle. When you left the temple, you found a messager waiting for you he asked if your family was the one with the dieing mother. When you said yes, he thanked you and ran off. 2 weeks later you forgot him when he shows up again. But not just him, he came with a carriage. He ask you to ready your house for a governor's kid. The nobleman's kid gets out of the carriage with a cleric once the preparations for dinner are over. Your family and the noble eat. Your father and noble seem to get along well with some small talk, but, after dinner, the noble turns to you. "I'm here on business. I have one goal, and that is to conquer Queans, the neighboring province, but my parents wish peace with them. They have decided that the best way to do this is to marry me to them. That means if I'm to conquest I must be married already. That's where you come in. You marry me, get paraded around for bit, and I'll heal your mother right here right now."