Shortly she wiggle, pressing her legs together and as she stood to go to bed I could see her nipples were very hard, as she turned to the kitchen I ca...ught her glancing at my now hard cock in my pajama bottoms and as she walked past me I swear I smelt her sex. I jumped up, not hiding my cock pressing against my pajamas and followed her wonderful ass I wanted so to lick, tongue, spank and fuck into the kitchen. As she got a drink of water it dribbled on her chin and the electricity was intense.. It was 10 o’clock. If she was serious about keeping her mind, she would need to focus and finish. No distractions like yesterday. She’d probably also need to find someone to study with tomorrow, since there was no way to be sure about where her memories would be in one more day.She reviewed the first five problems a few times until she was pretty sure she understood what she was doing, and then she set to work on the unfinished problems. She had to watch a few tutorials on Youtube, but she was. "You're a fucking whore! That's what you really are. You're nothing but a cheap slut. I can't believe you're my sister, you fucking masochist! If you don't cum right now, I'm gonna squeeze your clit even harder! Okay. You asked for it..." Lisa warned Jan, and then promptly followed through with her clit-squeezing threat.And Jan's uniquely-masochistic response was to orgasm strongly for the first time that night, thanks to Lisa's clit-squeezing fingertips, and her insulting potty-mouth, combined. "Now show us all what you can do."Her heart pounding, Penny unzips Don's pants and his burgeoning erection almost bursts out of them. Without missing a beat, Penny wraps her lips around it and begins to blow him enthusiastically. Laura grabs a handful of Penny's hair and gently encourages her to take Don's cock deeper and deeper into her mouth.Penny takes him as far into her throat as she can, then pulls back, gasping for air. "Looks like she's thirsty," observes Laura as she picks up Don's.