My cousin [f] and I have always been attracted to each other (hot cousin scenario) but never acknowledged it until recently. We're from the US so it's kind of taboo here, although in a few states it's still totally fine to marry your cousin. We're also 12 years apart and I'm over 30. She started texting me about her feelings so I reciprocated and this tension built up. We both knew that it'd be so weird to actually go through with anything too. Anyways, we've shared a bed a few times but always just slept, not touching or anything - except this last time. We jumped in bed, she was wearing tiny shorts and I had my boxer briefs on. We started off not touching, and I casually just moved closer and she accepted the advances, so I put my arm around her and we spooned for a while. At this point though there was no way we were falling asleep, the tension was way too much and she pushed herself into me so I started grinding on her. From here it just kind of snowballed out of control, her hand moved down to my boxers and she drew her finger over, I was so hard at this point. She grabbed my package and squeezed it hard, while with her mouth she started to suck one of my fingers. This was so insane. I didn't know what to do so I asked what she thought we should do, and she started removing her bra, and she said 'we need to do this'. (Neither of us are intoxicated) but we kept going, she moved off my body and got herself into sixty-nine position, slowly removing my cock. I was harder now than I can ever remember, this was just so wrong and taboo, it's what made it so hot I think. I pulled her legs over my head and positioned myself for the sixty-nine, we both still hadn't gone in for the kill, she kept moaning and then again said it 'we need to do this'. So I went for it, I slid her panties to the side and dove in, at the same time she went down on me, almost immediately deep-throating me. It felt like heaven, I can't describe it really. The wrongness and skill she displayed just made it hotter than any sexual encounter I've had. We sixty-nined for a while, until she couldn't handle it anymore, and just wanted me inside her, she got off me, and jerked me off intensely, trying to make me cum. She started sucking me and jerking, she told me she wanted me to cum on her face, it was too much for me but I quickly came. She then slurps up my cum and then promptly sits right on my cock, which is still rock hard. We are fucking now. I just can't stop thinking about how good this is, until all of a sudden I start seeing my family in my head. Her parents, my parents, what the fuck am I doing. She's fucking me hard right now, pushing me deep into her. I snap out of it and gain control, I move behind her and start doggy style, now she's moaning and bites a pillow to quiet herself. All of a sudden she stops, we both look at each other and she tells me she needs me to tell her how much I love her as a cousin. I'm losing my hardon fast, I tell her that I do and she notices I'm going limp, so she goes down on me until I'm hard again. I get on my back and she gets on top, inserting me, now this was the position I wasn't ready for, with her over me, looking down at me, now asking me how good of a cousin she thought I was.