After frolicking a little on our own. I made my way to her and as I grabbed her by her hips she wrapped her legs around me and her elbows on my shoulders. Her hard nipples were obvious and pressed against me. I kissed her as passionately as I could and massaged her breasts at the same time. I started to undo her bikini top and threw it on the shore. Her bikini bottoms were tied on the sides so I undid those as well. As we continued to make out in the cool waters I dropped my trunks and rubbed the tip of my dick against her vagina. As I did that a few times, her legs released their hold around me and she grabbed my cock and led me back to the shore.
As she reached the waist high water, I stopped her and urged her forward a little so that the water would be at her tailbone. I slipped my hands between her legs and rubbed her clit while I started to lick her tailbone. She shuddered and pushed her butt out and spread her legs. I reached my other hand around her and kneaded her breast. Her nipples were diamond hard and even underwater I could feel how wet my sexy naked girlfriend was. I stood up and steered her towards the shore and once there put her into a face down ass up position and licked her pussy. Her hips began to move towards and away from me so I slid my finger inside her. As I licked her pussy and fingered her she started to moan which always makes me lose control.
I stopped and knelt behind her and held her by her waist and slowly slid my shaft inside her. Slowly I thrusted inside her and with every stroke I went deeper and harder. My balls were swinging to and fro slapping her mons. I leaned over and hugged her, trying to see how deep and hard I could fuck her until I realized she was also slamming hard into me. Not wanting to ruin her rhythm, I leaned back and watched as she forcefully rammed her sweet ass into my pelvis. I loved her being so sexually expressive and loved the visual of her rear end engulfing my cock.
Her big beautiful breasts were swinging wildly, slapping against her skin and I felt myself getting closer to cumming. I always believe that nice guys finish last and I always want my woman to cum before I do but being outdoors and the overall experience had me on the verge of exploding inside her. I think she knew this as well as she reached a hand through her legs and cupped my balls. She told me to cum in her but I really didn't want to so just as I was about to I pulled my cock out of her cunt and pressed it against her anus, I grabbed her by the hips and pulled her hard against me and thrusted a few times until my cum shot out and landed on her tailbone. I let go of her and dropped back onto my heels, she turned around and lifted my cum drenched dick to her mouth and sucked and licked the cum off. She tickled my balls when she was done and even sucked them as she stroked me, "You owe me an orgasm" she said and I told her I would repay in full before the end of the day. We helped each other up and went back into the water to enjoy the waterfall.