Recommended reading - After Midnight, by Helen Nielsen (1966):

After Midnight

by Helen Nielsen.

ASIN: B0007E0IM4

Published by Morrow.

First published 1966.

First Edition.

Hardcover.

Description:

A beautiful suspect with an intense desire to kill. The murder of Roger Warren seemed like an open-and-shut case.The evening before, Roger and his dazzling wife Wanda had moved from one bar to another, fighting loudly and publicly. The next morning, the dead figure of Roger was slumped in a living room chair … while Wanda lay sleeping in bed, a bloodied knife on the pillow beside her. At the District Attorney’s office, the bereaved beauty could remember nothing . . . except an intense desire to kill.