The thing is she has really low self esteem after all of that abuse and she thinks that riftan would be disappointed if she is not the lady he "expected"
But I feel like this one is expected, *Opening Up* is not easy especially when you have trauma... maximilian fears the fact that if they were to see the fact that she is not the noble lady she thought she was They'd look down on her, Riftan might abuse her or throw her aside, The servants might mistreat her, They might do the same sh*t people from croix castle did to her...
When you have low self esteem, you don't have the courage to blame someone because you think you're the one at fault. Her natural mindset is she's lacking (probs because of the stuttering too), not "my parents are the one at fault"
She's scared that if Riftan found out she was useless that she has no importance, He'd beat her up like his father did. Because SHE WAS BEAT UP FOR BEING USELESS (Said by SO CALLED father {F*ck him by the way}) FOR 20 YEARS.
Trauma looks like a foolish matter at the surface but it is pure agony for the person who is actually going trough it. Like Maxi would think all the worst possible outcome and not think of any good outcomes. Her mindset became so dark and blurred after all the bad treatment she got ╯︿╰
I understand her not being open about the physical abuse. But considering how much of an ass her father is she could open up about other thonga. Like legit put it all on her dad. Tell them that her dad really didn't have any intention on keeping his promise so he kept her in the dark about Riftans exploits They already k ow hes a peice of shit. It would follow that he'd try to keep his daughter from going to Anatol. And that he'd try to keep his daughter around to marry off again.