The Night Nurse's Pregnancy

Kaylee has yet another night shift to work. What promised to be a dull evening changes when she discovers her stomach growing. As the night wears on and she continues to get bigger, she comes to the inevitable conclusion, she is pregnant. The question is: with what? Vague bursts of memory suggest something happened to her on the drive in. She tries to hide her condition, but her growing belly makes this impossible. She tries to run home, feigning illness, only to go into labor as soon as she arrives. Whatever spent the night growing in her womb wants out and there's nothing she can do to stop it.