I give the EXACT advice as teebonetone right here under, and give you even more advice added, go launch her in the most decent CLASSY but extreme Perverse Cuckold & swinging Lifestyle, (most Fine advice secret...)...try to lead her into getting a little little more bossy over you, ....that will give her quicker dirty bad fantasy thoughts because of an extra awearness of freedom with you !
Once she submits, she will know the true intense pleasure of having a real man inside her. I would recommend getting her dressed up in a very short pleated black skirt, a low cut blouse, and take her to a bar out of town, so she won't have to worry about running into anyone she knows. Arrange for a black guy to be there. Drop her off, and follow her in about 10 minutes later so you can watch the fun she will be having.