Never Live Twice — Dan J. Marlowe

How can a man's own wife be mixed up in one tawdry scheme after another, right under her husband's nose, and keep the secret?

Ask me -- I'm the husband.

It was four years too late when I discovered Louisa was a woman who made her own rules. For everything, including what every discontented little housewife needs -- a foolproof method for becoming a wealthy young widow.