She sat down on my stomach,

facing away from me. She looked over her shoulder. I had a good view on Anna's ass and couldn' t stop staring. She giggled and her face forward again. Her left hand rested on my thigh to support her weight. Her right hand was slowly caressing the tip of my cock. She pulled my foreskin down and hesitantly poked my bare head. I jerked and she giggled. She continued to push my shafts into different directions only to watch it jump up again. At some point Anna had seen enough and came back to what she promised me. Her hand stroked down on my cock. And then back up again. This was essentially not different from what I've done already plenty of times before, but it felt way better. With every stroke I feared to explode in her hand then and there. I guess she somehow read my mind because she slowed down a bit.
Anna turned around again, to see me shivering on the bed. She gave me a kiss and continued. Her hands began to move faster with every motion. But then she stopped. Just to slowly start over again. I used my free hands to caress her hips and ass. Pulling the fabric aside to give me a better view. I slowly ran my fingers under the fabric and down between her cheeks. Right above her asshole, I jerked again. Her fingers had pinched my dick.
"This is your turn."
So I just grabbed her ass and squeezed it tightly. Anna proceeded. Up and down. Up and down. Faster and faster. I swear I was about to bust anytime, but I didn't want this to be over just yet.
"This is taking some time", Anna jokingly said, "are you holding back?"
I barely moaned out a response.
"Don't. Just let go. I promise this won't be the last time. Or do you want to take over?"