She said it right there on national TV, and there's a transcript, so if Merrill Jessop want's to sue for slander, he can. But since truth is an absolute defense against a slander charge, I'm guessing he won't be suing her for it.
"GRACE: Carolyn, when you say your children suffered violence, what exactly do you mean?
JESSOP: Well, you know, it was from multiple levels. Merrill did a form of water torture on babies, and it was a method he called breaking them, where he would take the baby and spank them until they were screaming out of control, and then he would hold the baby face up under a tap of running water for a minute, maybe as long as a minute, and then he`d take a baby out, spank them again and then the process would just repeat. He`d do this until the baby was just so exhausted, it couldn`t fight anymore. He called it breaking them. And what the method was behind it was to instill an extreme level of fear for their father, but do it at an age that they wouldn`t remember the process that was used to instill that fear.
GRACE: What would the wives do as he did this to their babies?
JESSOP: You know, he did it to my oldest son, and I still can`t talk about it without crying. I witnessed it. I was terrified of him. I was still a -- I mean, I was in my -- I had barely turned 20. I was pregnant, with morning sickness and incredibly ill with my second baby. And I didn`t dare to say anything. I was afraid he would be worse and hurt my baby worse. But after that one episode, he never did it in front of me again. But I`m aware, you know, since then, from things that people have told me, that he did it with several of my babies. He just never did it in front of me again."
http://transcripts.cnn.com/TRANSCRIPTS/0804/17/ng.01.html