Baby Brother

Little Billy was so excited because his Mom told him he was getting a baby brother.  He said to his teacher every day, when he came to school, "I'm getting a brother."  One day his Mom allowed him to feel the baby kicking in her belly.  The next day he went to school, but didn't say anything to his teacher, so the teacher asked what happened to his brother.

He replied, "I think Mommy ate him."