A what if i suggested for Hunter to blackmail Ophelia with went something like this.
What if Hunter tricked Ophelia that he found some loophole in a law that allowed them to be get married. He forces a choice on Ophelia that she must marry him or they will all be kicked out. So faced with a hard choice, she marries Hunter for the good of her kids. This can be early before Brenna's onlyfan really takes off or even later before they had a chance to tell them that they are good on money, but don't tell her before she does the deed with Hunter.