Forgive me in advance.

I came home right after school today which is unusual, I normally stay late do to academics and after school programs, I'm a nerd I know.
Anyways, came home right after school, the front door was locked which never happens and I had forgotten my key so I went around back to try that door. It too was locked so I used an ID and managed to get it opened. As soon as I came in I knew something was off. I heard music coming from the downstairs living and as I slowly came down the stairs I heard talking, dirty talk, and moaning with other unknown sounds. Then from my vantage point I saw it. My mother was laying on her back deepthroating a toy while the white college kid from three doors down was eating my mothers pussy. Behind him my father, who apparently has an enormous penis was stroking in and out of his butt. It looked like my father was going to turn him right side out. I was suddenly lost my breath as I watched my fathers amazing cock stretch this young, short and little college boy ass. My mother moaned loudly when every she pulled the toy out of her throat. He ate her pussy and asshole wildly. I wanted to turn and run and pretend I never saw this but I was compelled to watch, I couldn't stop. I felt a wave of hot tingles over come me and then my own vagina began to throb uncontrollably. I could feel my juices building up and beginning to drop from my lips. I don't know why I did it, something just took over. I had my hand up my skirt and I began to passionately rub my clit and skip my fingers inside of me. I bit my lip as I pleased myself, trying to keep quite. Very quickly I found myself climaxing, but I accidentally let out a loud heart felt moan of euphoric pleasure. Then I realized I was the one being watched.
I didn't know what to say or do, I had just gushed on the stairs watching my parents in this act. I ran to my room and locked the door. I waited for them to knock and try to talk to me, but they never did. They act like it never happened and I haven't the heart yet to talk to them about it. I can't get it out of my head and now when ever I see them, I think of it, my mom naked, my father naked, his big cock, him fucking that boy, the boy eating my mother. Everytine I think about it, my pussy becomes soaking wet. I'm so conflicted. I play with myself thinking about it and orgasim so good, but then I feel horrible. More so now because now I'm starting to want to have sex with my dad, his cock is so wide. What am I going to do? I'm disgusting.