A Necessary Wife (en Inglés) - Heather Boyd

Widower Milo Westfall lost his faith in love the moment he discovered the wife he adored was guilty of repeated infidelity. But ever a practical man, he wants a mother for his children and comfortable companionship. Distrustful of all women though, he's determined to avoid the marriage mart entirely by making a logical, passionless match to his best friend's spinster sister. What he did not expect was the passion a new wife could bring to his bed...or the suspicion that giving in too often might lead to deeper feelings he's learned to fear.

Betrayed by a sister who eloped with her beau, Amelia Reynolds has good reasons for accepting Milo's unexpected marriage of convenience offer: he'll provide her the children she's always longed for and she's not expected to love him. But as she adjusts her new role as mother and wife, she is compelled to mend her husband's broken heart, for the sake of improving their friendship at first. Yet the more she understands, the more she succumbs to passion, the greater her feelings for him grow-but falling in love with him would certainly ruin their entire arrangement and drive a wedge between them forever since he's promised never to love her, too.