Murder? [short mystery]

It had always been her ritual, and Thomas, her husband, had tried to stop her without avail. No one could control the passion and the unfading desire within her that made her depart from the house that night. The night that had enveloped a neighborhood along the Underground Railroad left her with a secure place to hide. No one saw her as she entered the beat up sedan quietly like a flock of runaway slaves, …

…sweet, innocent voice. "Mom, you make it seem like you're killing children; you're so stealthy about it. I mean, don't you wonder why the neighbors try to stop you? They think you're a loony toon. Mr. Pluto thinks you're murdering the kids. If you don't start behavior normally, you may get arrested in the name of justice," her son said, grabbing a soda from the fridge. "Murdering children? Where did he get that absurd idea?"