Panic, flashes of images of those approaching and it wasn't Sarah's feelings or memories, it was Peter's. Pain and suffering, but more, utter helplessness, and the latter something that she knew her husband absolutely and completely loathed feeling. They'd not only tortured him, but they'd stripped him down to that, and with that realization, control snapped, all sense of normal morality fled and that dark fury that had been leashed below the surface was now free. These people had hurt Peter and she'd destroy them all if it was necessary to keep them from getting near him again, from inflicting any more of what they had on him.
A vampire lunged in their direction and Sarah reacted just as quickly, the thrown crystal morphing midair into a wooden stake, pointed end aflame, that buried itself in the vampire's chest before it could reach them, proving her practice hadn't been in vain. Sarah didn't even pause to watch the combustion, just turned on the next individuals coming at them as she yelled back at Nathan.
"Go!" Her attention didn't waver, she just waited for the feel of Peter letting go that meant Nathan was taking Peter towards the stairs while she took care of those closest. The man now approaching had a familiar face, in a way, as it was one that had just flashed across her mind. That memory not her own.
He was on fire the second after she hit him squarely in the stomach with the next crystal, the shattering of it launching flames upward in an explosive eruption, enveloping both clothing and face. It was enough to knock the man back, into another, catching his clothing alight too, and it was ultimately the diversion necessary to get the others to the stairs once they'd dealt with the closest dangers to themselves.