Congrats. You are a lucky man. I would BULK up before she is dating age. Build more big trucks to park in the driveway and spend your evening on the porch cleaning a shotgun or rifle of some sort.
What you do is lay her down and cover her nose and mouth with your mouth, but take a deep breath, then blow really hard. If it all goes well that little peter should fire outta there and you will have another boy. If not, go buy some guns and a lie detector for her dates.