Regarding ambiguous consent in this manhwa:
1. Maxi is definitely not underaged. She is the oldest of two sisters. While it's not explained in the manhwa, the novel detailed on how Max is the firstborn daughter. The state of her 'disability' (and her being female) bring shame to her household. Her mother tries many time to bear another child that is healthy (preferably male) but died after many miscarriages. After that his father remarried, and her sister Rosenthal was born. She is the pretty, smart child his father always wanted. She grow up showered with gifts from suitors. So it's implied that her little sister Rose is of age, so does Maxi since she is older.
2. This one I'm not sure with, but I believe her inability to comprehend intercourse is caused by her upbringing instead of her mental capacity. Since her father focused his attention on Rose, Maxi was abandoned. Her existence was concealed by her father, blaming it on her 'sickness'. She is not living in the main quarters, always wearing raged clothes, and doesn't receive any education (in later chapters: she doesn't know basic math or currency and will learn from Ruth). Everything she knows about marriage and marital duties are about obedience to her husband, that was told to her in passing by her nanny. She didn't know you are supposed you have s*x, let alone what is s*x. And Riftan doesn't know that, since Maxi comes off as a treasured, sheltered daughter of a duke when in fact she is hidden because of shame. He thinks her reluctance is caused by disgust when in fact she is completely ignorant and scared. Riftan will gradually show his affection to Max, something she is also unfamiliar with. But because of that, she felt safe with him and even began to seek his touches. I think the only rapey scene is their wedding night (he was focused on consummating their marriage). Cause from then on, in my opinion, their bedtime exercises are quite reciprocal. She even begin to think it as something shared between the two of them.
3. Riftan seems rapey because he's determined to be with Max since the beginning but he's a common born, so his assumptions of Max is based on a lot of insecurity and guilt which leads to poor communications, jealousy, and misunderstanding. He thinks he's trapping Max, while Max thinks it's the other way around.
