Finally, she pulled her finger out and sucked it into her own mouth. Jack and Melissa stopped their kissing, resting cheek to cheek as they watched th...ir mother take her finger into her own mouth and suck their combined saliva into her own mouth.“Come on!” she whispered. Dad led the way up the stairs and soon all four had entered the bedroom where once only Cal and his beautiful wife Jen had been intimate. Mom turned to Jack. “Get on the bed darling,” her voice was husky with lust. “Melissa and. I knew that Gabe wouldbe out already, he needed to get to his job. I still had work to do on mythrusters; I was close to understanding why my thrusters worked againsthard surfaces, but not against water or air molecules. I really needed tofix that. Robin Gazarra had delivered on his promise to send me some newmaterials from DARPA and I needed to do some tests on them. Maybe one ofthose would solve the repulsing thrust against water or air, or evenboth.As I walked through the deserted hallways. .we're both sitting here wondering what IS going on, and wondering why you're not telling us." "Damn," I said adding my own thoughts to my younger sister's reasoning. "So you see? I was suspicious, I just didn't know what to be suspicious about. But then a few days ago, I saw something else, that neither one of you realized I had seen, and that confused me even more, until I began putting two and two together." "Ok, so where else did we fuck up then?" Penny asked, though I was surprised that. So I explained what it was and he definitely wanted to "join". Since we were close to the back of the plane and the loo, we planned our strategy. He walked back to "use" the loo. I waited a few seconds and then walked to the back of the plane and entered the loo with him. As soon as that door locked, he was on his knees and started sucking my cock. I pulled his jeans down and started to play with his huge uncut cock. Although I usually top, I wanted to ride his cock. I put some lube (yes,I was.