Harry had cordoned off a section of his house for Phaedra. He'd put security measures in place so that she could never, ever even try to use him as a snack. And Harry trusted her.
Peter dropping his head was a lot more trust than most people ever showed Phaedra. She started to tell him not to trust her that much, but managed to stop the words before they came out of her mouth.
Her hand was absently smoothing and ruffling the hair on the back of Peter's neck. The longer she sat here, the more comfortable it all became. He was so, so tired.... if she stayed here, it was likely that Peter would fall asleep partially in her arms. That would be a first.
She couldn't do much more than she already was. An embrace could hurt him, quite a bit--at least right now. Phaedra was not the type to want to comfort anyone, but that's what she wanted to do.
So with very deliberate slowness, she leaned herself forward to plant a light kiss at the corner of his mouth.