fend off

You attempt to fend the zombie off with the towel you used on his girlfriend’s leg. Unfortunately, it seems like the blood covering the towel is just making him more aggressive. Suddenly, you feel the zombie’s weight lighten and see him gaze longingly at a female lifeguard who has come over to help you. The two of you struggle with the zombie slowly gaining ground. Out of nowhere the lifeguard screams and you see the zombie girlfriend biting her leg. Do you help the lifeguard or leave the lifeguard?