Two stories for the price of one.
Really enjoyed The Count's Secret Baby by Jennie Lucas. Carrie wanted love, and Theo was incapable of love. When he first heard her say the words, he disappeared for a year, leaving Carrie alone and pregnant. Finding out he now has a son, he wants Carrie back, but by his rules.
The Sandoval Baby by Kate Hewitt, I did not enjoy. I swear I read the first half of the story in a longer book. Rafe finds out he has a three-year-old son his ex-wife had kept from him. After her death, he goes to bring his son home, but ends up with the nanny who has raised him as well, Freya.