Which child is mine?

the long version

Two women in labor... A delivery ward chaos... A mix-up during a blackout... For three years, single mother Jillian Kendall had raised her daughter, Abby, and built a secure and loving home. But her happiness was threatened by Chase Remmington's claims that their babies had been switched at birth. Jillian would do anything to keep the child she'd lovingly raised, but she also wanted Marianne, the baby she'd given birth to.... The only way Jillian could have both little girls was to marry Chase. Although he was a mystery to her, she saw the tenderness in his eyes when he looked at her daughter. Jillian also saw the passion in his eyes when he looked at her. Could Jillian find the courage to accept everything Chase offered? (from goodreads)