The cat
It can be really hard waking up in the middle of the night for months in a row just because your baby can not sleep. Finally, when your baby has a night of full rest, you thank your lucky stars it has happened at last. Because before then, you were sleepwalking during the night and a half awake most of the time.
This mother was waking up so much during the night that she stopped paying attention to what she was actually doing. What happened was that in the middle of the night, she heard her baby crying, tried to nurse it back to sleep then realized she was forcing the cat toward her chest.