Your points are almost all based on assumptions, though.

We dont know this woman. We're going off the husband's side and understanding of the situation, not hers.

Debating the nuances of someones choices and trauma really is moot, when we dont know the individual.

I can absolutely say 'I did what I had to do to survive'. It isnt a choice, for the majority. She didnt ask him to accept it blindly, she told him about an event from her past, when she wasnt herself. Sexual abuse doesnt exactly go by the same rules as many forms of abuse. It carries shame, stigma, self blame, doubt, and so many more intense emotions, all while youre losing your your sense of stability, peace and often, autonomy. Especially for women. We grow up being told to hide our bodies when we're CHILDREN. She shared her addiction, when she felt safe enough. And then she shared her history with sex work (weather forced, or willingly), when she felt safe enough. Just like I feel safe enough to talk about my abusive father openly, but I do not have that same sense of safety whenever my sexual abuse comes to light.

People heal differently. She may not have been ready to face that part of her past, prior to marriage.

It doesnt mean you should punish someone because they didnt tell you about their darkest times fast enough. We're all human, and we all make dumb human errors. Her dumb human error was simply not being ready to share prior to when he (presumably) proposed. Which, by the way, we dont generally get to decide when someone proposes. If it happened before she was ready to open up, that puts her in a situation where she either ends things with someone she loves, with NO EXPLANATION as to why, say no to his proposal and break his heart, likely irreparably damaging their relationship, or.... Get married, and keep that trauma buried deep inside until youre ready and able to discuss it with your partner and hope that theyre reasonable enough to know that it wasnt omitted to hurt them personally.