Perhaps, she shouldn't have told her mother the truth, but by the time Penelope texted her that Daniel wanted them to get married, she lost it.
How could Daniel think of such a thing without discussing it with her? Does she want to get married to Daniel?
Of course, not!
Women were still underrated at this age and Natalie's dream was to become a doctor, not Daniel's wife. She wanted to make history with her discoveries and make progress in the health sector. She wanted to make life easier for humankind.
But then, Daniel could never understand because he was a selfish bastard. He only wanted her for himself and never once asked what she wanted. He doesn't know her likes and dislikes because he never asks and just assumes.
