Responses
The confusion was understandable because the last chapter is about Alberto protecting them. The word "husband" actually refered to the Prince. She is saying that she is super happy with her husband, her brother supporting them as a Chancellor and Alberto protecting them as a knight. For the King still trusting the Queen, indeed. She is so shady and politicaly savy that it's a wonder he did not doubt her that much.
PS: google translate is your friend!
SPOILER
Marie ends up with Alberto and they have a wedding.UWU