"Jack!" Robert was outraged. "Arrest Severus! On my orders! An attack against an unarmed defensless wizard is a breech of law. Arrest him at once! I dont have time for his anger management issues right now!" He put himself in check and immediately got hold of his anger and gave Jack a silent look of apology.
He turned to Brian. "You'll have to let go, Son," Robert said slowly. "You have no choice."
"Do you have her?" Brian asked.
"Only just. And she has him."
"How can you do this?" Brian asked. Robert was hurt himself.
"Until my last breath, if I have to. I'm not letting go. If I let go, she dies."
"Can't you just break her contact?"
"No," Kate said softly. "Not now. If he does, they both die. We must depend on Remus to guide us now. She...she's done something on the other side. She's bound to Thaor at the moment. Unless we find the right way, if Thaor dies, she dies with him."
"Will you die with her and Thaor?" Brian looked at Robert, unbelieving.
"Yes," Robert said softly. He was becoming very fatherly and parental with the people around him now. It was a horrible moment for everyone. And they needed to be guided through it. Not strongarmed. "If I have to, to try to save my daughter, I will. Now, follow my orders, Son." Michael took his arm away from Jack and laid it on Robert's shoulder.
"If you can take any of mine, then do it," Michael said. Michael knew that Jack would gladly lend some of her life energies to save Thaor if someone asked her. But Michael knew that if it didn't work they might all well die trying to save him and Khaat. He was not even going to suggest it of her. He didn't have the heart to risk losing Jack too. He stayed silent. Deliberately didn't look at her. He was hoping that Jack was not bright enough to catch that, although Robert's errand was important, it could also wait. Robert was doing his best to protect any more people from dying than necessary. In short, he was trying to protect Jack in his own odd way, just like Michael was trying to do.
Brian had no choice. He broke contact with them to take out his wand and cast the Vunera Sanantur over Thaor's sectumsempras to heal them.