No, but you recognize the couple

Suddenly I recognized them. They were our parents. Our parents passed us by as we fucked. Paige couldn't see them, and there was no way I was going to make her aware. I continued slowly fucking my sister as our parents passed us, chatting loudly with each other. I paid no attention to what they were saying, I was busy hoping they couldn't hear or see us. They passed right by us, but then they stopped just down hill from our position. I almost panicked and my cock slipped out of Paige. I froze for a moment and Paige reached back and tried to reinsert my dick into her with her gloved, frost covered hand. She failed.

"What are you doing? Hurry up..." she whispered. I remained frozen, waiting to see if Mum and Dad had heard. Soon I became clear that they hadn't, in fact they appeared to be kissing and paying no attention to us. I quickly felt for my cock which had softened slightly but was now almost completely hard again. The idea of my parents being so close while I fucked their daughter was a massive turn on now that I knew they hadn't seen us. I aimed my cock back at Paige and without taking my eyes of our parents reinserted it into her pussy and resuming fucking her. I refrained from slamming myself into her as I didn't want our skin to slap together like had been earlier, but I fucked her hard and fast regardless.

Our parents continued making out, completely oblivious to their frisky children fucking each others brains out only 20 feet away. My orgasm quickly re-approached and rapidly overtook me. Paige reached her climax at almost the same time. She bucked against my cock as it erupted deep in her tunnel and I splattered her insides with hot cum. My toes curled of their own accord and I was practically paralysed as the waves of pleasure swept over me. I didn't think I could cum more than I have the last few nights, but I did. While I watched my parents making out nearby I pumped load after load of semen into my sister's snatch until it was squelching out the sides coating my balls and running down both of our legs. Just as my balls emptied and the semen stopped flowing our parents broke their contact and resuming skiing down the mountain, soon completely out of sight.

I collapsed onto my sister's back and she collapsed into the snow as I let out a massive sigh of relief and contentment.

"That was awesome." she said.

"You have no idea." I told her.

After a few moments rest we got back to our feet and tried to clean ourselves off. Our legs were coated in cum and there was even some on our bunched up ski pants. I quickly cleaned myself off as best I could in these conditions and was fully dressed again in no time. Paige was scooping cum out of her pussy and swallowing it before she wiped the cum off her clothes and legs and flicked it onto the snow. Once she was dressed we checked each other for any visible cum and then continued down the mountain. It was almost 5pm so we headed back to the house as the sun would be setting any moment and we had to be ready to leave at 6:30 when our parents would be coming by to pick up some of the girls so we could head home.

As soon as we entered the nice warm house we both immediately stripped our clothes off in the entry way as our legs still had some cum on them and we felt dirty. My cock was hard again as soon as I saw my sisters exposed body and I began to wonder if there was something wrong with me. How much **** could my dick take before it dropped off or something. I tried to ignore my arousal and headed for the shower but Paige beat me to it.