What are my chances of getting custody if my spouse is living with a boyfriend who is a felon?

Nobody can answer this question without knowing the entire situation-it is like asking a mechanic on line, there is a noise in my car, what is it. If you are asking whether the fact that the boyfriend has a felony conviction is enough to get the kid yanked out of her home, the answer is, no, not all by itself. The courts deal with all kinds of parents with all kinds of flaws and imperfections in their lives.