The fascinating cases of every day, seemingly average moms, wives and girlfriends accused of murder. Did they really do it? And if so, why?

Planning a crime often takes a lot of work and some deviously clever thinking. This series profiles women who use twisted ingenuity to come up with elaborate schemes that result in what they think are perfect crimes. No matter the motive -- whether it's power, control or money -- the women stop at nothing to get what they want.

What happens when "the other woman" tires of her title? Monstresses on bio. recounts the most sensational stories of cheating men and their out-of-control mistresses. Each episode introduces two mistresses and reveals the deadly consequences as they take matters into their own hands.