Our ride home from the camping trip was pretty quiet, Dad thanked me for looking after my sister (oh if only he knew) and said the Ranger who came to visit us was impressed we'd not freaked out. Clara and I texted each other a lot on the drive home too, we agreed that what we shared was magical and if we could get away with it, would continue when we got home. We were both a little worried about Mom's impending chat but agreed to stick together if challenged. We finally arrived home and once the car was unpacked, Clara and I were given all the laundry to do.
"Your Dad and I are going to the store, get some fresh food for the fridge. Please get this stuff at least washed before we get back okay." Said Mom as she left.
Once we got the first load sorted and in the washer, Clara pulled me close and kissed me.
"I can't wait to fuck you in an actual bed but for now how about you bend me over the washer and take me from behind. I need a shower after that drive and would love to feel your cum leaking out of me while I do." She said, rubbing my cock through my jeans.
I didn't need to be asked twice, I dropped my jeans and boxers and got behind Clara who'd already stepped out of her panties and had her summer dress bunched up round her waist. Her ass looked amazing and seeing it was enough to finish getting me hard, I eased my cock inside her and held her as I thrust my cock in and out of her. I tried to hold out as long as I could but when I felt her cumming, her fingers furiously rubbing her clit, I couldn't hold back and pushed in deep as I sprayed her pussy with cum. I stayed inside her until I'd finished then pulled out.
"Well at least you put a washing load on before having fun." Said Mom, in our passions we didn't see her sitting on the basement stairs.
I quickly pulled my pants up, Clara slowly pulled her panties up and straightened her dress.
"How long were you there?" Said Clara.
"The whole time, my ankle is still a little tender so your father insisted I just rest and dropped me off again. If you're both done, come and chat with me at the table." She said then left the room.
"That was wonderful by the way." Said Clara quietly who kissed me on the cheek then followed mom.
Mom had a smile on her face as she waited for us to sit down, we both sat together opposite her.
"As I said at the campsite, I'm not upset but I want to know how it happened." Said Mom.
Clara told her everything, I could feel my face get red but Mom just kept smiling. She left out the part about the Ranger catching us though, something Mom picked up on.
"So, what were you doing when Alison showed up?" Said Mom.
"What do you mean?" Replied Clara.
"I'm going to tell you both something and it stays between the 3 of us. Alison used to date your Uncle Ken, she was a little young for him though and they broke up but before they did, I used to sleep with her. One weekend Ken caught us and we had a 3 way affair for a long time. When we got back, Alison called me and told me everything."
"Three way as in, you both just had sex with Alison?" Said Clara.
"Three way as in your Uncle would fuck both me and Alison at the same time. Your Dad knew and got a pass to fuck his secretary but now you can see why I am not upset about you two." Said Mom.
"That's awesome, do you still have sex with him?" Said Clara with a grin.
"No, he said he enjoyed it but since he became 'born again' he became a bit of a prude. Your Aunt Elizabeth is to blame I'm sure but I still love him all the same."
"So what happens now?" Said Clara.
"Just don't get caught okay, not sure how your Dad would react." Said Mom, kissed us both on the forehead then left.
Mom's 'clearance' only emboldened Clara and I, we were soon having sex any and every time we could, sometimes when Mom was in another room. One Saturday, Clara went out with a few of her friends, she texted me that her period had started which meant no sex for a couple of days. Being used to sex daily by that point I decided I needed release, put some porn on my computer and laid back on my bed to jerk off with my baby oil. I was just getting my favorite part of my chosen video when my door opened and Mom walked in. I froze, (my video played on of course, one of my femdom videos where the Mistress rode a younger guy while he sucked another mans cock) and didn't think to cover myself up. Mom looked at my cock for a second, tried to look away but looked at my video screen, stared at that for a few seconds then back to my cock.
"I uh, sorry, I thought you were at work." I eventually said.
"I, I should have knocked. Won't Clara be taking care of that when she gets back?" Said Mom, still looking at my cock.
"Is that time of the month so I'm on my own."
"Close your eyes and lay back."
"What for?" I asked.
"Don't ask questions, just do as your told." She said sternly.
I did so and a few seconds later felt her get on the bed and straddle me, next thing I knew my Mom was impaling herself on my cock and with a few thrusts had taken me all the way inside her.
"Oh fffffffuck that feels so good." She said.