"Time for more crunches," she said as she lay me down on my back. "But this time we are going to do them right." She sat down on my stomach and pulled my knees up. Then she lie back down on me and put her feet flat next to mine. "The best way to do crunches is slow, and with a cock up your ass" she said as she grabbed my tool and pushed its head at her sphincter.
This shocked me a little. We had only done anal once about a week or two before that, and she didn't seem to enjoy it as much as she did straight vaginal sex, so I never pushed her to do it again like I had in the first place. Maybe now that she was setting the terms and keeping the pace she was a little more comfortable with it. But when she pushed herself down on me it felt wonderful. She didn't even push me all the way into her, she just got about 2/3rds of it into her, and then she reached her arm up behind my head and started pulling me up with her.
Now, we had done quite a few crunches for me earlier, and with her on top of me like this, there was so much added resistance that I was going to really be working hard to keep up with her. We sat up and did a couple of crunches, and her ass felt great around my dick, but my abs were starting to feel a big burn by now. I wasn't sure how many of these I was going to be able to do. I had to drop my shoulders down and let her do a couple on her own before I could go on any further.
"Are you ok dear? Do you want me to stop?" she asked as she paused her workout on top of me. She was breathing heavily as well, but not as heavily as I was.
"I'm fine... I just... I just need to catch my breath... You can... keep going if... if you like..."
"Ok... If you feel like joining back in with me, try to get your lower abs by lifting your hips." She said back to me and then went back to her crunches.
I just lay there with my hands on her hips as she did a few crunches on top of me. I did catch my breath a little by then, and the idea of lifting my hips up to hers sounded like the best idea yet. I gripped her sides and pulled her down to me as I pushed my dick up into her ass a little farther. As beat as I was getting I was still as hard as ever, and I was getting anxious to get off into her. She nearly lost her balance from what I had just done, but she quickly recovered, and slowed down her movements to better keep up with what I was now doing so that when I pulled her down again she kept her rhythm and we were now almost fucking normally. It felt awesome, and after a few thrusts like this she stopped with the crunches all together and just let my fuck her ass with us on our backs.
"Oh.... That feels so good..." she said as she lifted her hips up to give me better access to her ass. "Oh that's so fucking good..." I reached up and grabbed her tits as I pumped in and out of her at a growing pace. I palmed her mounds and pinched her nipples as our breathing got heavier than it was during our workout just before. That's what you get when you go from her workout to mine, more cardio and less work.
She sat up and put her hands on my chest as I continued to fuck up into her ass harder and faster. She was moaning steadily now and so was I. I was getting really tired out at this point, and I was so glad that I had that day off, even if she didn't. I was pounding her ass as hard as I could and we were both finally getting off from it, and I was so happy that I was going to get to go back to bed and sleep after this major fuck session. But right now I was fucking, and so I grabbed on to her waist, flipped us onto our stomachs, and fucked her from behind for a bit. Her ass was nice and tight and I could feel my orgasm nearing quickly. I drove my cock down into her bowels as she shoved her ass right back at me thrust for thrust.
This was fun and all, but I was getting tired of having her facing away from me as well, so I pulled out of her and rolled her over to face me now. The change of positions also gave me a chance to calm down a bit so that I could last just that little bit longer. I plunged into her at a lightning pace and was grunting and groaning as she moaned and whined from our early morning fucking. The bed was shacking and I was sure that the whole neighborhood was going to wake up from it but I still didn't care I was having so much fun.
Only I was getting completely worn out, and could barely hold myself up anymore, so I changed our position yet again and rolled her up on top of me so that she could "Ride em cowboy" for me, or on me, or both... I reached up and played with her tits some more as she bounced up and down on my still throbbing manhood. I almost passed out I was still pushing myself so hard. Luckily she was doing most of the work now, and I was getting close to cumming finally.
"Oh god I'm gonna cum..." she cried as she thrust her body up and down on my protruding member. I was glad that she was almost finished as well because I couldn't take much more. "Make me cum... make me cum..."
I wasn't me that was going to make her cum, I was as close to lifeless as I could be and still be conscious. No, she was getting herself off on me at this point, and what the hell, so long as she doesn't complain about it later. She rode me long and hard until I finally felt myself about to cum. I let loose inside of her and nearly howled as I came what felt like buckets up into her pussy. She leaned started shacking and shuddering as well, and her whole body convulsed as she came with me and leaned forward to kiss me as we rode the waves of our simultaneous orgasms.
"Oh fuck that was great..." she said as she broke our kiss and I caressed her back, about to fall asleep as quickly as I ever had before. I was this close to falling asleep as I heard a knock at the door.
"Mom, you woke me up working out again" I heard her eighteen year old daughter say through the door as the sun was coming up.
"Sorry sweety. I'll try to keep it down next time. Go back to bed now." She said as she got up to grab her robe.
"You always say that." she said as her mother opened the door to lead her away from our room. I'm just glad she let me cover up first this time. One of these days I'll have to get that teen to join in on the fun. Either that or sound proof the room...