Almost immediately, she had him back in her mouth, her head bobbing as she fucked him. I gave her a while and then told her that was enough. Pat grabb...d the back of his thighs and held him as she pushed her head forward. His cock must have entered her throat, but to make sure, I eased her head forward with my hand. He too helped and held Pat's head and pushed his hips forward. I could see Pat was straining to open her mouth more, but there was no more cock to swallow.Pat succumbed, she was. His phone rang and he answered it. "Hello?"Keith -- it's Jenna."Jenna -- how are you doing? You were out sick today."Mom took me to the hospital... "Hospital!"My doctor has his office there. They drew blood and ran a bunch of tests to figure out why I'm having these reactions."And?"Everything's normal ... normal for someone with Type I diabetes, that is."Are you skipping your class tonight?"Yeah. I'm taking tomorrow off, too. Mom thinks I'm over-extending myself. Maybe she's right. Maybe I am. She was five foot four with short blond hair and brown eyes, and a good firm, cheerleader body. Her tits weren’t huge, 34B, but that was perfect for her cheering. They were very well displayed today, in her tight tanktop and sports bra. She leaned back and put on her shades, seeming to relax or even rest. In fact she was looking at her brother. Rick was wearing shorts too, and she wasn’t sure but his crotch seemed to be bulging. She felt weird a little, but she liked it. “So what are you doing. “Look Cass…” Nope, still nothing. When she realised I had nothing to say she whimpered and turned over. What could I do? Obviously I loved and cared for my youngest sister. But not in that way. Not the same way I loved Jenny. Poor little Cassie. My heart ached and I didn’t know what to do. The guilt I felt was immeasurable. Seeing her facing the wall crying her little heart out because of me was the worst part of it. All of a sudden she turned around, determination in her eyes, taking me by.