She shuddered as I traced the line of her camel toe with my fingertip. I toyed with her pussy lips for a moment then gripping the waist of her shorts ...I urged her to lift her wide hips so that I could slide them down. We kissed some more as I toyed with her now naked cunt, it was as wet as any that I could recall. "Mmmm", she moaned, "that feels so good", as I ran my finger through her wetness. "Are you going to fuck me now?" Yes", I told her honestly as I rolled up onto my knees between her. OK here goes." I take a huge breath, knowing that this could change things forever. "So yesterday, I saw someone wearing pantyhose and they looked absolutely gorgeous in them." I stop short of telling Jess that it was her. "So after you went to bed I couldn't stop thinking about this woman and I got really turned on. I went to my room to, well... you know." Jess is nodding along. She hasn't taken her eyes off me once. "So I'm in my room and I remember my ex left some of her things here. I don't. He was jet black in color with a coat as sleek and bright as polished onyx."Ok girls let's get to it, this is Thunder and we need to collect both a blood and urine sample from him." "I'm going to show you how to draw the blood but I want you to get one of the plastic cups to catch some of his urine in when he pees." I have rubber gloves in the kit there so you can put those on." Instructed Dr. Blake.The girls both looked at each other with sheepish grins wondering who would be the one to hold. Susan appeared shocked at this, claiming she'd be riding me every night if I was hers. I blushed but she didn't appear to notice as she eased over to sit closer to me and softly caressed my leg. I felt a little uneasy and said, "I'm not too sure about this." It's okay sweetie," she said, "just go with it." Her hand moved further up my thigh and then over the bulge in my pants. My cock was rock hard by now."I don't know, it just isn't right, You're my girlfriend's mother," I said. But I didn't.