Scared I will Never Get a White Woman Pregnant

I came back home the next night after work, and was greeted by my wife and child, my wife's mother, and the black father of the child, all together and all ganged up on me. My mother-in-law was behind all this, at least in part, and I should have known it. She has cheated on her husband -- my wife's dad (who I admire) -- throughout their marriage. And my wife is actually the product of one of those affairs, though I didn't know that until this past week, and I don't know if her dad knows. So, my M-I-L has been totally supportive of my wife's infidelity. The father of the child told me the relationship with my wife isn't over, the tattoo isn't coming off my wife's mound (because it's true of her body and soul, he says), and I'm expected to stay with my wife, provide for her and the child, and keep up the appearance of one big happy family. My wife cried at the hospital for me to stay because we were alone, but now with her ** mother and her black lover behind her, she says she deserves the happiness that this arrangement gives her and she laughs at my pain. That tsunami is starting to pull me back out to sea: I'm lost.