..” She cut off her words, glancing at Mom. She was caught up in the drama of the singing number. “In my butt.”“Uh-huh,” I groaned, my groin...pressing into her soft butt-cheeks. I was in her all the way. “Just enjoy.”I diddled her clit as I slowly pumped my hips. I couldn't be passive this time. I had to fuck my sister. I knew it was even greater risk, but I needed to cum so badly. I needed to flood my sister's ass. I glanced at Mom, watching her as I worked my cock in and out of my sister's. Now during the week, he did find out about things she likes and dislikes. And he too, was forthcoming to her as well. They both love the outdoors. She even likes to hunt and fish. She just loves to live life to its fullest.“Josh? Mind if I ask you a question?” Josh nodded, as he took a swig of beer. “Go right ahead”“What ended your marriage, if you don’t mind me asking?”“The short version is this job.” he then laughed, then continued “Deb did not want me to work like I was….. Amy and I were. But we really enjoyed it. I then said just now I would like it if you sucked my cock till I cum in your mouth. And she said sure thing no problem. And Dave said I'll take that as well. Sure thing she said and smiled at us.I then asked if she enjoyed the sex Dave and I just gave her and she said yes I did but I didn't expect you to double team me the way you two young boys did. You really fucked me proper and it was enjoyable having those orgasms as well as squirting again. That's good I replied. "Derrick, are you ok?" Shelby asked really worried now, she swore if she could feel pain she would be right now."A regulator!" Derrick shouted closing Shelby's panel and running to his desk, immediately he began to draw an energy regulator."Thank you Shelby! I have a possible answer, I want you to start running tests on the power fluctuations going into and coming out of trans-warp. See if the fluctuations spike high enough or drop low enough to destabilize the shrouds long enough to detonate.