My sister often brought her friend to us

My sister often brought her friend to us. Her name was Agnes. She was blonde, rather tall, with lush breasts and a nice-looking ass. I never really wanted to be friends with her, but there was absolutely no way I could hide the fact that I liked her outwardly.

One day when my little sister invited Agnes out again, I decided to act. While she was alone in the kitchen (my sister had gone out), I went over to the countertop and started to do my business. I made myself a coffee. Agnes was a little embarrassed, and I decided that this was the most appropriate moment to slap her on the ass. She reacted in an unexpectedly excited and violent way, turning around abruptly and kissing me. I quickly realized that my interest was mutual, so we began caressing each other's pussies through our clothes. We also kissed with a tremendous amount of drooling.

This whole epic went on until we heard our sister coming back. We stopped it all at once, but with a look we let each other know that this was far from the end, but only the beginning.