When we'd heard the knock on the door, we both realized that we couldn't very well hide what it was we'd been doing. It was too late for that. Nervous, hell...scarred shitless even, I'd looked at Kris, that moment passing between us when we'd made the decision to accept whatever consequences came our way because of it.
After that brief moment of surprised shock, which we'd both fully expected, it was the sudden smile that came to mom's face, which we hadn't. For a moment I know Kris and I were more confused than anything else, lying there beneath the covers totally naked, holding hands.
"Well, I guess I shouldn't be all that surprised," mom said closing the door behind her as she leaned against it looking down at us. "To be honest, I've been expecting it, and surprised it hadn't happened before now. I've seen it coming, even though I don't think the two of you did, so I honestly figured it was only a matter of time." Mom then stepped over towards the bed sitting down at the end looking at us for a moment. "I am going to ask you to do something for me though," she then said waiting expectantly.
"What?" Kris managed to ask though I heard a bit of a tremble in her voice as she said it. She was still nervous and more than a bit caught off guard by mom's revelation.
"Although I expected it, and as I said, not too terribly surprised, I know your father will be. So what I'm going to ask you to do, as hard and as difficult as it might be, especially now, is to NOT tell him, not yet anyway. If you can, I'd rather he not learn about this until after the two of you have moved out. Perhaps then we can slowly warm him up to the idea. Not only that, it will give the two of you a chance to think it through yourselves. You might find that in time that this won't work, though you might also find that it will. I think until the two of you know for sure, one way or the other, that it's best to not yet concern or worry your father over it. For the moment at least, I'd ask that you keep this a secret just between the three of us."
Mom stood and headed back towards the door after getting our assurance that we'd do that, keeping our newfound relationship a secret for the time being at least.
"We're going to go for a drive around the lake sometime after breakfast," she informed us. Her smile told us there was a hidden agenda to that as well. "There's a special place we used to go," she hinted. "Thought we'd go up there and spend some time together in the afternoon. While we are, that should at least give the two of you time to enjoy yourselves as well. Just make sure that any evidence," she emphasized suggestively, "is cleaned up and taken care of by the time we return. Other than that, just be careful, and don't do anything stupid or foolish either."
We both knew what she meant by that too. "We won't," I assured her. Mom smiled once again and put her hand on the door knob.
"You're father will be up soon, breakfast is almost ready, so if you wouldn't mind..." she said leaving off, and then stepped back out into the hallway closing the door firmly behind her once again when she left.
The one very strange thing about all this was, I was hard as a fucking rock! I am sure it was a mixture of the intensity of mom's walking in and finding the two of us in bed together, naked as she sat talking to us, basically giving us her blessing at least to continue to explore our relationship. Something I now knew I had every intention of doing. Holding my sister's hand, I now pulled it over towards me, placing it on my hard stiff prick.
"Robbie!" she squealed yanking her hand away, not in disgust certainly, but knowing full well how aroused I was at the moment, though with mom's reasonable warning to us, she wasn't about to go against her wishes either. "You'll just have to wait until after they go for their own little drive," she said coquettishly, "But after they do...you can do with me whatever you want!" She promised suggestively.
Kris hurriedly dressed after that, and then slipped out of my bedroom back into hers to change clothes and head out to help mom with the breakfast. I lay there, my hand once again wrapped about my own cock, more fondling and playing with it than having the intent to make myself cum. There was plenty of time for that later, and I smiled knowing that we were going to share a very erotic, very sensual day together. I soon rolled out of bed, dressed, and headed out into the kitchen. I found that I was famished, walked out, gave mom a kiss on the back of her neck which caused her to giggle almost like a teenager herself, though she shooed me away from her shortly after that, reminding me to behave myself. The three of us were still sharing secretive looks and glances when dad made his way down for breakfast, though mom once again gave us both a couple of warning looks in addition to those.
I felt like a kid about to go out on his first date with the promise of delights in store afterwards. The moment mom and dad had driven off, I grabbed up a large fluffy blanket after having first taken off all my clothes.
"What are you doing?" Kris asked curiously, seeing me suddenly naked and holding nothing more than the blanket in my arms.
"We're going for a short little walk...naked," I grinned at her. "So come on Kris, take off your clothes, mom and dad might have just left, but I really don't want to waste a lot of precious time either!"