For the last 4 or 5 years, I have truly tried to feel guilty about what I have been doing. But it just is not possible. I think because the two girls are so different. They taste different. They look different. They feel different. One does a lot of things I like. The other does not. One isn't very old. The other is close to my age. And one sexually turns me on in ways I have not felt in years. The other, I go through the motions when she wants to feel good, actually initiates things, and on occasion, I will do the same, so I won't lead her to believe something weird is going on.

Two days ago, my step daughter again had her friend spend the night. In years past, we had flirted, joked, made our comments, and one thing led to another one night, and I did not realize a girl her young age could do to me sexually what she did. Looking back, I should question how much she had been around, or how much she had done with how many people, but I did not. The reason was simple: That night, I fucked someone other than my wife without a condom, completely raw, and without question, I had the most massive orgasm inside another girl I had ever had. I didn't think about the age at the time, more than I hoped she wouldn't tell, would not brag to a friend, and would not share what we had done that night with someone that could possibly get me in trouble. She didn't, and it continued.

About a year after it began, my step daughter became aware of our affair, and called us out on it. I found out that night, she also had a side to her I was not aware of. Very dirty, very sexual, very taboo, and very perverse. I didn't ever know this side of her, until she watched us consummate our sexual relationship, and then approximately two hours later, ask if she could be sexually involved with us, and experiment. That evening, I had a threesome with my step daughter and her young friend. And I had no regrets, because I had never experienced something like that.

Two days ago, when her friend spent the night, again, that evening, we did things sexually that the world would not find acceptable, and would not appreciate or approve of. It was also the first time in my relationship that my step daughter let me cum inside her. I had in the past used condoms, to take precautions, even though she has been on birth control. But that evening, we did things we had never done. As I did things with her friend Marie that I had never done before. That evening, I had sex with both girls, together, and then separate. They went through every possible sexual motion that we could, and I was given the opportunity to cum inside both of them on separate occasions. It was among the most intense sex I have had in my entire lifetime. When we got done, I was able to watch the girls clean themselves up. I stood there staring at both of them naked, literally having had my cock inside them. But what made it better, when it was said and done, was that her friend Marie was cleaned up and dressed, and I felt my cock harden again. I don't know why this had never happened in the past. Sexually, I was more stimulated than I had ever been. And I asked my step daughter if we could repeat some of what we had done. Marie looked at me in utter shock and said "I've never seen a guy do it three times. Serious? You can do that?" I shrugged and said I didn't know. I had never physically had sex three times in a single day in my entire life.

When my step daughter slowly undressed, I stood there staring at her round little ass, her wide hips, and her small firm boobs. I felt my cock grow harder. I slowly undressed, and stood there naked. My step daughter came up to me, and she slid down to her knees slowly. And took me in her mouth. She had never done this before, explaining she felt it crossed the line with the fact that I routinely fucked her mom. I understood, although I won't deny, I was disappointed, because I wanted to experience everything. She truly is, amazing looking. I had looked at her for years, but never had the balls or the guts to be forward enough to pursue it. Rather, I chose to pursue something sexually with a friend.

The other night, on the third time having sex that evening, my body shook. I couldn't control myself. I was so overwhelmed physically, I had never literally felt this stimulated in my life. When I entered my step daughter's small young pussy again for the second time that night, I felt her wrap around me. I felt it tense up. I felt her hands around me. Pulling me. Slowly at first, and then harder.

I kissed her. In a passionate way I had never done before. She opened her mouth, as Marie gasped and said "holy shit" and I kissed her. Slid my tongue inside her mouth, and proceeded to passionately kiss her in the most intense sexual way I had never done, as my thrusting cock slowly entered her young pussy, pulled back, and then entered her again.

I felt it pulsing inside, and I felt the orgasm building intensely. My body started trembling. I felt her hands wrap around my naked body, pull my naked ass towards her harder, and I heard her gasp. And she said "please dad. Cum inside me". Hearing her say that, shook and trembled me to the core. And I came. Harder and faster than I had ever done. I gasped. I moaned. I spoke her name in pants and fast-paced breathing. As the sperm squirted forth from my hard pulsing throbbing cock.

I collapsed on top of her. I laid there naked. Completely spent. I heard Marie say "sweet Lord. I haven ever seen something like that"

We finished up, cleaned up, and I will leave it there. But what made it worse was that night, when the girls went to bed, I went into the shower and cleaned myself off. I took a very long hot shower, thinking about the intense experience I just had. Until the next morning, something happened that I have never had happen before in my entire marriage. My wife came home, and for whatever reason, chose to pursue sex with me that morning, shortly after she came into the bedroom. She literally woke me up, and came onto me in the hardest and most passionate way she could.

We started going through the motions. I felt my cock throb. I had never done this. I felt it growing harder by the second, as she kissed me, pulled off my pajama bottoms, and started sucking on my cock. She started rubbing herself, and got herself wet and climbed on. Riding me, several minutes later, I felt her gasp, heard her moan, and heard her say she was going to cum. I was riding her hips, pulling her on my cock, and she kept gasping as she had multiple orgasms. When she was done, she laid there. Looked at me and said she wanted to feel me cum.

I tried. Desperately. I pumped inside her. I thrust inside her. She finally asked if I wanted to do it in a different way. No matter how hard I pounded her pussy, I could not explode. I had nothing left, after having cum three times the previous evening.

What finally did it, when she was bent over in front of me, it was not her round bigger ass for a woman her age. It was nothing to do with her physically. I closed my eyes, I thought about it, fantasized about it, and when I opened my eyes, I had the amazing dirty sexual fantasy that it was my step daughter in front of me. I had my hands on her round firm bigger ass, I was pulling her hips against my thrusting throbbing hard cock, and I blew. I had a massive body shaking orgasm inside my wife's pussy, thinking about when I released every ounce of cum into my step daughter the night before.

It's dirty as fuck, and I can't help myself. But it is the most intense sex I had ever had in my life, and I cannot stop thinking about it. I desperately want to fuck her again. But feel like a dirty ass old man for constantly wanting to do shit that "society" doesn't approve of. But what makes it even harder? Thinking about fucking my wife, knowing that it's so difficult to get through. With exceptions of thinking about the dirty shit I've been doing, to help me go through the motions...