As a veteran of this debate, I’ll jump in on this. Under the common law definiition of rape, EJ did technically rape Sami. In many (if not all) jurisdictions, you can criminally prosecute someone for rape under duress. With Lucas being trapped and Sami under a time constraint to find some way to save him, she was clearly under duress. Depending on the jursidiction, and with these facts, a prosecutor would almost certainly go foward with charges of rape against EJ and probably win (or he would have to plea bargain, whatever).
But was it rape emotionally? I think we can look to Sami’s subsequent actions and say that she certainly doesn’t consider it rape. Especially if you compare this time around with how traumatized she was the first time she was raped (which certainly covered any legal and emotional definitions). Or if she ever did believe she was raped by EJ (I believe she did accuse him once), she’s apparently gotten over it. Enough so that she not only had sex with him again, but continues a relationship that is a tad beyond just dealing with him because he is the father of two of her children. So, IMO, she has essentially given up any right to claim EJ raped her as a defense/justiciation to anything she does to him and vice-versa (and it’s interesting to note that she’s never even done that–another indication that she’s not horribly traumatized by her rapist).