She turns

You groan, your dick erupting against your front door. You've just cummed while watching the first living person you've seen in months get gang-raped in front of your fortified home.

Outside, the deads are still at it, filling and covering her full of white creamy fluid, while you lean against your door to recover from your shamefully-good orgasm.

When you bring your attention back to the outside, you see the woman taking on a more proactive role in the encounter. It seems she's turned into one of them, taking pleasure in the lewd act and moaning suggestively to taunt the studs into using her more. You legitimately do not know whether to be more excited or horrified. What if that happened to you? Zombies taking you and fucking you until you became one of them? Maybe that wouldn't be so bad...