When we first started dating my wife(29F) was on top and I(33M) was getting very handsy with my fingers brushing against her asshole. She leaned forward and whispered "you can do anything that you want to me." That was the only consent I needed and before she knew what was happening I grabbed the back of her neck and pinned her face first into the bed. She gave no protest as I held her down with one hand and grabbed the lube out of my night stand. She flinched as I dribbled the cold lube onto her ass crack and started massaging it onto her asshole. She seemed to really enjoy the invasive feeling of my finger on the most personal spot on her body as I prepared it for what was to come. She let out a small moan as I inserted my finger into her ass and began slowly probing it to warm her up. God she was so tight and and reactive to each movement of my finger. I couldn't wait any longer after gently finger fucking her asshole and I slowly withdrew it with a gasp and watched her body relax as if she was a puppet that had it's strings cut. I watched her stare at my cock as I dripped the lube onto it and began stroking to cover every inch.

After I was throughly lubed I then climbed on top of her and the second I pressed the head of my cock against her (almost virgin) asshole she immediately tensed up. I slapped her ass and told her to relax her body and it was so satisfying to watch her immediately obey and melt back into the bed. I again pressed myself into her asshole and was pleased to see that she was still obeying me and staying relaxed. As the tip reluctantly pressed inside her she moaned softly and I continued to slowly advance the full length of myself inside her. I loved the feeling of my cock plugging her tight ass as I sat there for a minute enjoying the feeling and having her grow accustomed to it. As I started to pull back I felt her tense up again and heard her moans turn to groans and she tensed up which earned her another sharp slap to her ass which she understood immediately. After she relaxed I began to continue slowly fucking her ass. Perhaps I'm a bit sadistic but the image of her face burying into the sheets and hearing her groan and whimper with each thrust had me rock hard. I began picking up the pace and before long I was fucking her ass at a regular pace with no pretense of making it easy for her, each whimper brought me closer to climax. The power I felt from her willing to give up her asshole solely for my pleasure and enjoyment was enthralling, it showed her devotion to our relationship completely. I couldn't hold back any longer and by this time I was quickly withdrawing my cock to the tip and forcefully slamming it into her with my entire length. She was loudly groaning at this point and begged me to finish soon as she was reaching her limits of anal endurance. The last thrust was immediately after I heard her begging and she sighed with relief as she felt my cock pulsate and spurt load after load into her ass and collapse on top of her. I told her how much I loved her as I kissed her from behind. I stayed inside of her while my cock softened which I can only imagine felt strange to her. I looked down and watched as her tight sphincter muscles squeeze every drop of cum as I withdrew my cock. The feeling was soooo satisfying. I got up and looked at the beautiful wreck that would be my future wife and turned to the bathroom to warn up the shower. I told her to join me and I tolde her how much I appreciated that and she smiled while I gently rinsed the lubed off her ass. She returned the favor and after a quick rinse she kneeled down and started giving my cock a nice massage with her tongue. We enjoyed fondling each other I took my time making sure she had the chance to cum until we ran out of hot water and dried off to cuddle in bed. Up until that point that was the hottest sex I had ever had and she was satisfied that she was able to give it to me.