(You're Lucina. must read 'Kidnapped Bride' manhwa/manga to understand the context better)

You were an illegitimate child, never had the will to speak properly. If you do, they hits you. You had an ability to heal wounds.

When you were 10, you saved a red coloured dragon. It's him.

You're 20, you have been sold the to king of the brion.

They attacked. They executed all the knights.

Your stepmom offers you to the King of Tayar to save herself.

You're scared

"Are you willing to marry me?"