As I spread out her pussy lips as far as they could go and stuck my tongue deep into her pussy. She immediately began moaning loudly and moving around...a bit. I moved my tongue around inside her pussy. She began moaning and breathing in and out slowly as well."Oh shit, Michelle, that is so damn good," Kate said.I put my hands up towards her boobs and pinched her nipples a bit. I titillated her a bit and of course I noticed that her pussy had gotten a lot wetter."I'm really getting you off too.. She giggled and kissed me back on another cheek, and offered me her other cheek now. Her fingers were playing near my neck and hair, as she was pressing herself on my lap unknowingly.I was somehow feeling guilty and aroused at the same time with my sister’s cuteness. I didn’t wanted her to think of me badly but I was starting to get attracted to her beauty. I shifted my head to the other side and kissed her sensually with my lustful instincts driving me.“Wow that was really nice. Thank you” She. I felt as though my stomach was full of butterflies and my pants were soaking wet with excitement. We had both had lovers during his absence but neither of us was involved in a serious affair. I told him I would like to see how it worked out as now we were heavily involved in our studies.I did not want him to know I would crawl over hot coals for him.I nearly wet myself with the concealed excitement as we walked home hand in hand. oOoJack had invited me and ‘a partner’ to celebrate his. “Bill, what are you doing here?” he asked when he saw me. My face must have alerted him to the serious nature of my visit. “Is it Melissa? What’s happened? Is she alright?” His questions came flooding out, faster than I could track them.“Dave, can we sit down?” I asked, gesturing inside. He stepped back and let me in.“Sure, but where’s Melissa? Is she okay?”We sat down in his formal living room. From its pristine state, I was sure it got as little regular use as ours. I took a deep breath..