Jenny's eyes narrow, "What did he do? Why do you hate him, make plots against him? Or maybe that's it. Maybe you've concocted schemes before, and he's stopped them from happening." She pauses, "He'll do it again. You'll never get whatever it is you want."
"...Do you really want to find out what that will cause?"
Jenny tries not to react, but she can feel her jaw clench as she speaks, "You're willing to kill all of the innocent people on this planet? My dads?" Jack, Ianto, Rose... "Even yourself? For what? Revenge?" She lowers her voice, "I won't let you do this. I'll get out, or my dads will show up---either way, we'll stop you."
Still, there is a part of her that can't help but think about the fact that she's just found her dads, met their friends and the people they consider family. To have it end like this, without getting to know any of them really.... it makes her hearts ache.