"So I Married A Saw Murderer"
"Rules of Disengagement"
"Unsavoury Company"
"Sleeping With the Antagonist"

So most of those are largely plagiarized... Meh. It's a working title.

As for your actual question, I did think up some morally depraved reactions with which to counter your "husband's" dastardly deeds. I wouldn't recommend any of them, but hopefully they'll give you a laugh anyhow.

My first thought was to go frolic with much glee among the more worthy of men. Seriously. "Husband" was he who opened this particular door by marrying that wretched harpy, now he has to play by his own rules. And perhaps you could catch one who would willingly support you emotionally, financially, and as more suitable parental figure for your spawn. And, if you don't find a decent partner any time soon or don't want one, at least you get some good sex out of it. It's a good stress reliever, I find. Sex, that is.

When he talks about his prostate or any other such thing that would attempt to garner pity, respond with much indifference or laugh at his pain. And when he says things like "***** you", reply, while giggling, "If only you had the skill and equipment to do so." Then sigh forlornly and walk away.

You could, perhaps, move to a far-away land and change your name/hair colour/general appearance/etc. While making efforts to establish a legitimate business, you, in the meantime, support yourself, your spawn, and your budding business by robbing rich people - you know, those seedy business types who procured their vast sums of money through highly unethical means and shouldn't have it to begin with ... to clear the conscience, because, if I recall, that thing is important somehow ... You could start with your husband for practice and to procure money for a bus ticket to the far-away land (or a plane, if you really want to be stylin'). The spawn could provide as the look-outs.

Drive "husband" absolutely bat-***** crazy. If you have to live with him, you should at least get some laughs out of it.

Find this harpy and demand a living space and financial aid. Since she insisted on marrying him, what's hers is his. And what's his is yours. So, logically, what's hers is yours. And she lives in a far-away land, which is conveniently away from "husband". So, before you go, reveal this naughty information to lawyers and the public and so forth, and then thoroughly suicide "husband's" business. When you move to the harpy wench's abode, you'll have a clean slate, as far as reputation goes, with which to establish a new business.

Wait the five years, kick the pups off to college, then suicide the business before you make your grand exit. After all, he did put you through all this mess, and you're going to be broke anyway when you leave. Might as well return the favour.

...

Yeah, most of these knee-jerk reactions are largely a result of my proclivity for illegal activity and insatiable desire for vengeance. Again, I don't recommend any of them. Actually, I recommend looking into legal avenues... then resorting to such guerrilla tactics as necessary.