Hmm, I guess it depends also from the point of view and baseline evaluation parameters (or in a less convoluted way, people often are more lenients in judging themselves than in judging others
), but at least in my book (again, I guess matter of points of view) sissification of Anthony, considering sissification as described by someone, would definitively put Myriam at the very least at the same level.
From Zorlun's original story, Myriam had already an element of submissiveness, wanting to please others (I am not forgetting the "protecting", just putting it on the side) and suggestions of a "daddy" complex. Anthony is still not exactly my concept of being an good husband, given his behaviour (to put it mildly
), but if it's true he took advantage of those aspects (and then, the game allows us to decide whether they develop more or not, also in interactions with other characters, not just Anthony), he did not create them.
For Myriam to go on the sissification on the level indicated by someone, Myriam would have effectively to create some conditions, even if it's true that Anthony is in reality a weak bully who needs to constantly feel reassured about his strength.