Our first kiss that night, after the sex we were definitely not supposed to have had. As we were drunk and exhausted we soon fell asleep. At some poin...t during the night, I woke up. She was still on top of me, but at least my cock had slipped out of her pussy. I changed the position and we slept the rest of the night in spoon position.In the morning, I woke up with a slight hangover. And with that kind of hangover, you feel horny with a huge and aching hard-on. She also woke up when my hard cock. That’s a shame. I can assure you that is not the case and if enjoying sex in all its forms makes you a “slut”, well then I guess we would both be “sluts” wouldn't we?” I grinned at her. She smiled at me. “Really? I never... Well, I thought….” “Its OK.” I said. “Relax. Let’s just let things flow. You don’t have to do anything you aren't comfortable with.” “OK.” She said, putting her head back on the table. “But…I want to make you happy, so….” “Shhhhh.” I responded, and turned my attention back. Instantly, mum stopped what she was doing — dam, I had broken the spell. I waited a few moments, then was delighted to hear the slurping noises start again. My head was now tilted below the level of her head, so as my face was not in her sight line, I gently opened my eyes and got them use to the dimmed bedroom lighting. I could see very small movements of the duvet as her hand manipulated against her pleasure zone, getting ever quicker in motion. Her head was above mine, and tilted towards me.. Maybe she was waiting for Jenna to go to sleep? Maybe she wasn't falling for my act. To tell you the truth, I was a little drunk (I had to drink some that night; Jill's no dope) and after listening for her return I fell asleep. And was re-awakened soon after...My room was dark. My jeans were being removed; then my boxers. I lay there, completely exposed, before?who? Was that 3 hands I felt? Clad in only my shirt, I waited for my sister's mouth on my cock. But instead, I heard her speak: 'Just.