This Christmas was my birthday, I finally turned 18! step-Mom was so happy she threw a huge party and invited all our relatives, including the ones I haven't seen in years, like Aunt Amy! I usually don't enjoy family gatherings, and being an introvert doesn't help at at in such situations. Though, I did enjoyed this party... despite all the uncomfortable questions I got, like why I don't have a girlfriend even though I'm a handsome young man and so on. I don't know how I managed to have a good time, maybe it was the **** step-Mom kept pouring into my glass, maybe it was Aunt Amy's jokes, I don't really know, but I felt at ease and relaxed. After the party all the guests vanished, step-Mom went to bed and me and Aunt Amy were the only awake people in the whole apartment. We talked, and I couldn't ignore her huge cleavage, those round big boobs she has. I can't remember my aunt other than a hot, a young hot woman with a mesmerizing body. It seems I turned 18 and she didn't age a day! I was trying to keep the conversation normal, all the while thinking about her huge Natural Boobs! Just imagining how I'd fondle and grip them If only I had the occasion... I was still looking at her cleavage when she asked frankly if I have a crush on her! Of course I denied, but she guessed my mind this time. It's obvious she has a lot of experience, and by thinking how she got all that experience my cock hardened in my pants. She asked me to massage her shoulders, help her relax, but I think she wanted to be touched. My cock twitches. I massage her shoulders, observing the milky white skin with an adolescentine curiosity when I actually feel her rubbing against my boner!... I was stunned! Well, I guessed she's kinda slutty, but it never crossed my mind she would enjoy a taboo encounter. I'm her nephew, and my step-mom, her step-sister, could surprise us at any moment! She already talks me into it, and, without realizing, my pants are down and my cock is in her mouth. I won't be a hypocrite, it's pervy and awesome and a true power trip to have your cock sucked off by your own aunt, but couldn't think of anything else besides my step-mom seeing us like this. The blowjob part was amazing, she knows her way with the tongue and even does DeepThroat! And people tell me that what you see in porn cannot be applied at home!... Seeing me so worried she told me that it was initially my step-Mom's idea, she actually asked her step-sister to fuck me, "to help me get rid of my virginity". Holy fuck, I can get rid of my virginity myself, don't need step-Mom to think about that! But the fact that I'm fucking aunt Amy right now, and it was step-Mom's idea makes my thoughts go crazy, and I feel the need to cum! After I fucked auntie's pussy as hard as I could and made her cum I told her to jack me off over those marvelous boobs, and my cum sploshed all over them! Auntie insisted that it's a secret, but I can't wait to boast to all my friends that I fucked my Hot Auntie!