As I started lapping away at her lovely little pucker, her sexy vocalizations brought a huge smile to my butt-pleasing lips."Ooooh my god, Russ! Aaahh... yes, baby, lick my ass... Lick my horny little asshole like thaaaat!"*****In the three days following the morning when Lizzie had gifted me with her virginity, we were kept pretty busy by the delicious task of making her pussy 'catch up' with her asshole. She even officially invested me with the power to 'take her pussy and have at it, anytime. The sensation of water rushing all over my body started to drift me off into a dream world, thinking of the feeling I had this afternoon as being millimetres away from having my cock inside my gf’s mum and the sight of that milf with her ass open and ready for me. I had started to massage my cock with the soapy water, it grew and was soon as hard as rock again, I was stood, in a world of my own, under the drenching shower, knees bent, stroking my long cock.“ahhemm” I heard a voice, I awoke from. My cock, on the other hand, did not care that I was day dreaming, and was at full attention in my pants. It was aching really bad, and I was thankful that I had some bags to cover it.The ride home was uneventful. The little ones were sound asleep. And my sister-in-law, Nichole, just doesn’t stop talking. She never shut up from the moment we got in the car, till the moment we got out.I brought the bags in, and went straight to our bedroom to bed.A little while later, my wife woke me when she was. I still needed to find out how functional it was, specifically, whether the minds who'd studied Algebra could understand Calculus, and vice versa. I had the perfect test up in my study: the Calculus assignment. I'd have the two minds that had not learned Calculus attempt some of the questions on it.I was also extremely curious about how the massive reduction in effort - from 100% down to sub-1% - was possible in just two days. I thought about that during the rest of breakfast, and had some.