Savage Obsession by Diana Hamilton
A second baby -- a second chance?

She'd been crazy to marry Charles Savage in the first place! And now, Beth was convinced that nothing--least of all her--would keep Charles from the woman he really loved.

Beth's marriage to Charles had effectively ended when she'd lost the child he so desperately wanted. There was no point in pretending she was still needed in his life. Especially when that other woman could offer him so much more--a son. His son?

Beth had reason to believe it was. Would her own pregnancy--which she discovered after she'd left Charles--even matter to him now?

— back cover