It was nice of you to buy me this exercise ball. I've wanted one for a long time but wasn't sure how to use it. Oh, I just lay on it and stretch? Like this? Hey, why are you looking at me like that? Oh, I see why you bought me this ball. You wanted to watch my toned body stretch. Now I get why you stare at me sometimes. I do admit to thinking my step-mom looks pretty sloppy lately. No wonder you're attracted more to me than her. I'm sure my tight tummy and tones ass looks much better naked and even in clothes than hers does. I know you like what you see right now because right now I see a bulge in your pants. Tell you what, since you were so nice and bought me something that will help with my fitness regimen, I can help you with that bulging muscle of yours in your pants. My step-mom is gone for about another hour so we have just enough time for me to work my bicep muscles by cranking your cock.