Take the knife back and use it. the woman isn't much of a threat.
From Create Your Own Story
You shove the shotgun back at Claire and take the knife out of her hand. "I've got this," you say, getting to your feet and tightening your grip on the knife.
"Like you had the last one?" She says, laying the flashlight down and raising the shotgun to her shoulder. "I don't think so."
"No, I have this one," you say, taking a step forward into the slimy gore of the subway car. "Don't fire the gun, it'll just attract attention." You carefully make your way through the car, trying to ignore the bodies on the floor and the chunks of human meat scattered around the seating, and raise the knife up. The woman slowly shambles towards you, guttural moans of what she'd like you to do to her continually escaping her lips.
When she's just in reach, you reach back with the knife and then swipe it quickly across her, just under her chin. More with luck than any skill, the blade catches her flesh and opens it up, and you take a step back to escape the spray of blood as it jettisons from the wound. She clutches at her throat, and takes another step towards you. You take another back, and your heel catches a puddle of core and slides out from under you. Toppling backwards onto a clump of bodies, you squeal in horror as the woman takes another step towards you.
The car lights up with a blast from the shotgun, and the booming echoes throughout the car and down the tunnel. The buckshot catches the woman in the chest, spinning her like a top and tossing her backwards onto the floor, dead as a door nail.
You breathe a sigh of relief even as you feel Claire's hand clutching at your arm. "Get up!" She exclaims. "We need to get back to that room, and we need to get back there now." She drags you to your feet, and you can feel blood from the corpses soaking through your clothing.
