Soon after you moved to college, I, your father, got a raise at work, with the condition that we have to move to new city. It wasn't actually the problem since we traveled with my work almost every few years in the past.

So the story starts with you, coming in our new home in the summer college break. After you left, me and your mother had a second breath in our sexual life. Somehow after years of boring sex, we started exploring kink, etc, maybe because I didn't have to work that much anymore as in the past.

The new house is planned differently as before. Before we had our and your room separated by the master bathroom, but now, the bathroom was on the other side, and our room shared a wall, and this is when everything started.

One evening, after you came home and was listening to the music, you noticed a strange shaky sounds coming from the wall. You took off your headphones and with the shock realized - your old folks were having sex, and not just any sex, it was pretty wild.
From the sound, you could tell that your mother was sitting on the table and I was fucking her as hard as I could, holding her neck and calling her names. God she liked that. You were shocked, yes, but the most important - you realized how horny that made you.
The next couple of days the story repeated itself, but this time, you couldn't hold yourself anymore, and was touching yourself to the sound of me slapping your mom in doggy, so wrong and at the same time so hot.
After a week or so, you felt that sounds is not enough, and when it was dark in the hall, you sneaked out and watched us fucking, you saw hard dick of your father for the first time and how he was cumming on your mother's face.

Once, when I was railing your mom from behind facing the door - I noticed a tiny light. It turns our you forgot to take off your watch and in the darkness I saw you staying and watching us.

TLDR: Daughter hears her parents fuck, gets horny and watches them.

Before we start, let's discuss where it going, here are my ideas:

1. I see you, but don't tell that immediately, putting some show for you.
2. We understand that we see each other, but can't stop. You stay there and touch yourself while I fuck your mom, making show for each other.
3. I come to your room later to tell you that I saw you.
4. Please tell me your other ideas. Some modification: I can see also the scenario, where you are with your brother in the room, hearing your parents fuck.