Desperately Seeking Dad by Marta Perry

Anne Morden was a breath away from adopting Emilie, the child she had always longed for. All that was left to do was to convince police chief Mitch Donovan to sign away the rights to his daughter. But with his denial of paternity, Mitch put Anne's lifelong dream on hold. Yet Mitch seemed determined to make things right, if only Anne could trust him enough to let him help.

The Marine's Baby by Deb Kastner

The US Marine Corps made a man out of Nathan Morningway. But the orphaned baby girl left to him by his military buddy made him a father. With no training in parenthood, Nathan heads home--where he's not exactly warmly welcomed by his family. But day-care worker Jessica Sabin helps him learn how to be a dad. That seems to make Jessica happy, so why does she look so sad sometimes?