The next week or so was a bit of a blur but a very pleasant one. Not only was I able to keep having sex with my mom whenever she got horny but I even got to fuck my sister a few more times and of course the occasional spanking for both of them.
One night mom was out for a while and we were sitting around the fire outside and enjoying a few drinks. Sarah always got drunk easily and after a few drinks she was already a bit buzzed. When I grabbed a fresh one for each of us, she looked at me and asked if mom was 'really out'. When I asked why, she said she'd been thinking of getting tied up and played with again but not spanked except she didn't want mom there this time. When I assured her that yes, mom was really out she said "then let's go -I'll meet you in mom's room."
We both went inside and I went to grab the restraints while she went to mom's room. When I got there, she was naked and laying face up on the bed. I had a quick thought so before I tied her, I had her turn so she was laying across the bed instead of lengthways. I tied her arms out wide to her sides and instead of tying her legs tight, I left plenty of room for them to move.
When I reached down to finger her pussy, she was already as wet as she'd been when I was fucking her the last time so I knew she was turned on by the thought of being tied. Instead of fingering her more, I just moved up between her legs and slid my cock into her. I'd enjoyed fucking her from behind last time but this way I could see the expression on her face as more and more of my cock slid in until there was no more space between us. I quickly figured out she liked the long, deep thrusts more than the short, shallow ones so I concentrated on those until I thought she was close to cumming. When I pulled out, she gave a disappointed groan until I slid a few fingers into her pussy and curled them as I thrust so I could get as much contact as I could with the sensitive spot just inside her pussy. When I thought she was close to cumming again I pulled my fingers out and when I pushed the tip of one against the pucker of her asshole I got a much happier moan as it slid in easily. Grabbing the lube I'd brought from my room, I added a bit to my fingers and soon had 3 fingers sliding in and out of her ass. Just to keep her on edge, I was teasing her clit and pussy with the fingers of my other hand. When I pulled away from both her pussy and ass she looked at me as if to say, "Now what?" but quickly figured that out when I lifted her legs as high as the ropes would allow and shifted so the head of my cock was pressing against her asshole. I'd only had anal sex with one other girl and she'd stopped me after 6 or so strokes saying it didn't feel good. Having watched Sarah use the vibrator on her ass plus me using the butt plug on her, I was pretty sure she'd be ok with it. As the head entered her ass, she started to moan again and with nice short, slow strokes I eased a bit more into her each time until the full length of my cock was in her ass. Occasionally I'd stop fucking her ass long enough to reach down and rub her clit for a few seconds before going back to sliding my cock in and out of her asshole. Any thoughts I had that she wouldn't enjoy it were wiped out when she said, "Oh fuck, that feels a lot better than a toy. Damn, I wish I'd tried a cock in my ass sooner!"
Realizing that mine was the first cock she'd ever had in her ass got me even more excited so just to see what would happen I kept fucking her ass but at the same time used one hand to play with her clit and the other one to tease her nipples. What happened was an orgasm like I'd never seen her have before. Her body arched up off the bed, she let out a loud "Oh FUCK!" and I could feel her ass clench on my cock and then release each time her pussy contracted as well. I really thought I was going to cum but I managed to hold on until she'd finished cumming.
When she somewhat relaxed on the bed she said, "oh my god - that was the most intense cum I've ever had.
I just smiled and nodded before saying, "I could tell and I'm glad it was - now it's my turn to cum."
I think she was expecting me to go back to fucking her ass so there was a total look of surprise on her face when I pulled out and shifted up over her body and she realized my cock was heading toward her mouth.
She knew she really couldn't move out of the way and said, "not after it's been in my ass, please?"
"Don't worry - I'm not going to put it in your mouth but I am going to cum."
I stopped with my cock about 6 inches from her face and started stroking it. When she realized what I was planning, she smiled a bit, licked her lips and opened her mouth. Likely very few people have enjoyed stroking themselves to orgasm right over their sisters face but I certainly was and it wasn't long before I was cumming too.
The first two spurts were right on target and went into her mouth, the next three landed from her forehead to her chin and then the last few ended up in or near her mouth again with the few remaining dribbles ending up on her neck. When I finally finished cumming she looked at me, gave me a cummy smile and said, "wow, never done that before either - how about a towel?"
I smiled back, untied her hands and grabbed a towel from the bathroom. When I got back, she'd wiped what she could off her face and was just cleaning it from her fingers.
She must have noticed the look on my face because she said, "Hey, nothing wrong with a bit of cum - how about giving your sister a nice kiss?"
Partly for the shock value and partly because it was something I'd never done either, I leaned down and gave her a long, hot kiss with lots of tongue. I could not only taste my cum but could feel it with my tongue and I was a bit surprised to find out that it tasted ok. When I backed away again Sarah had a totally shocked look on her face and stammered, "Holy shit.. I was just kidding but that was hot - I definitely want to do it again sometime."
I was tempted to curl up with her on mom's bed but didn't really want mom to find us asleep there when she got home so we both got ready for bed and crashed for the night.
Along with everything else through the week, I'd also been wondering how I could arrange to see my mom and sister spank each other. Fortunately, that worked itself out beautifully without me having to arrange anything. I got home from work and as soon as I opened the front door I could hear them arguing. When I got to the kitchen and asked what was wrong, mom told me that she'd asked Sarah to do the laundry while she was out but it didn't get done. When I asked Sarah what was happening she said that she'd already agreed to look after supper and cleanup the kitchen so mom should do the laundry instead of going out with one of her friends. That started them both yelling at each other again until I yelled even louder "STOP IT!"
That stopped both of them and now they were looking at me. "So, let me get this straight. Mom, you'd asked Sarah to the laundry and when it wasn't done you called her a lazy bitch? Did you remember that she was also doing supper and cleaning the kitchen?"
"No, I forgot that this was her day to cook."