Becca begins the story as a single, pregnant mother-to-be. Her doctor is not in; and so she signs up with his partner, who happens to be the hunk she used to lust after in high school in a different city. Dr. Hunk is dating a worthless bimbo. We have the basis for a heart-warming romance here.
This is "just" a sexy, romantic story. But it has some nice twists - a single mom-to-be who regards herself as beautiful and who has a real life that blends in nicely with the story, an old friendship that comes back to life, and lots of other nice details.
But breastfeeding IS a form of birth control. Just not a very effective form, if you're really serious about controlling births.