A stepmother & stepson's secret passions - telling stepdaddy "You are not the stepfather!"

I can't believe we're about to tell your stepfather is NOT the stepfather...because YOU ARE. This makes step mommy sooooo happy. This whole time he thought he was the one who got me pregnant. When it was you, our stepson, all along. We couldn't help falling in love with each other sweetie. This is our destiny. The desire step mommy has is only for you. Your stepfather will move on with his life & we can start our own! It was meant to be. Ahhhh he should be pulling up the driveway any minute. My nerves are making me horny. Time for a quickie? I can't wait for this to be over with so I can jump on you & straddle your throbbing cock. I want you inside me so bad. As soon as he leaves we'll fuck. Can you believe how big my belly has grown? You put this baby inside stepmommy. I love you so much! In a few minutes after we tell your stepfather, you'll be gazing up at stepmom's naked, glowing pregnant body grinding up & down on your dick...