If Jordan made her jump then of course she will want to protect herself, she in no way went and deliberately bit him or showed dominance over him. Therefore it has to go down as a nasty experience and you need to learn from it. There is no need to punish Sienna she was just doing what comes naturally, a nip for a dog is just a telling off and as humans we have to remember that they do not communicate in the same way as us. I'm sure Jordan will learn from his mistake and as well as keeping the dogs off the furniture and making sure Jordan knows what he can and can't do with them I would possibly do some training with him, such as letting him feed the dogs (preparing their dinner, making them sit and wait for it, Jordan eating a biscuit so they can see, then putting the bowls down and then giving them the command that they can eat) so that it establishes the fact that he is higher up in the pack then they are (with children around it is easy for a dog to sometimes put themselves above them, after all you have to teach a pup when he crosses the line?!)
I would also keep her out the way if he has any friends over or you have any other children visiting.
I would also keep her out the way if he has any friends over or you have any other children visiting.