Both were wearing pink t-shirts, jeans, and boots. Denise's top was a little snug, so I figured it might be Ann's. It only made it look better on her...."Wow!", I finally managed, Have I got some pretty sisters, or what!"Even the girls seemed to like that one. I had a second cup of coffee, while they ate. Then it was time to meet the 'critters'. Before we started, Ann had us put some overalls on top of our school clothes.We decided that Ann should tell us what to do, while we did the work. That. She was wearing a clingy dress of a shimmery material, with a purple and black design. Like the night before, though, it wasn't especially revealing, with a skirt that reached her knees and very little scoop in front. She did, however, do her makeup quite exotically, with ruby lipstick.We had a very nice dinner, and I soon realized to my amazement that Stella was sending out definite signals of interest in me. Clearly, she felt comfortable enough with me to start telling me a little about her. Circuits were being soldered and wires were connected as lasers were projected through long series of powerful lenses. Computations were made all over the place as they worked. Each advancement was met with an equally important failure - along with head-bashing against the wall frustration.“Status?” Lyman asked as he entered the lab.“We’ve finished the designs for the detection systems. Using these, it would be easy for a system to pick up a detonation, scan it and determine the inverse. When her pussy stopped gushing hot juices onto my cock, she relaxed and panted for air. I kissed her deeply. She kissed back feverishly. That orgasm of hers left her hornier than before.Grabbing her butt, I rolled us over, getting mom on top. We continued to kiss as she assumed more control. She fucked in an easy pace, but her vaginal manipulation of my cock was more intense as she used the extra control to coordinate her action.Breaking the kiss, I inserted the index finger of my right hand.