POCD getting worse or am I a pervert?

I has this dream last night that my sister got molested, (she is half my age btw) and during the dream I began touching myself over it and had an orgasm. I awoke instantly and wasn't surprised because I can literally get off on anything but I was still disgusted. I tried to forget about it and go about my day but I felt sick being around my sister after having a dream like that. I don't have any urge to act on these thoughts and couldn't imagine myself with a child of an sort, it makes me cringe. I tried testing myself by masturbating and thinking about things to see if I had a response and I did. I immediately stopped thinking about it and tried to think of someone my age. It's not the same arousal I get when I think about sex with someone who I'm legit attracted to (older people obviously) but it's the kind of arousal I get when the subject matter is taboo or whatever. I feel like I'm not explaining this really well but I don't know if this is POCD anymore or if I have some sort of disorder.

What makes the arousal different? Is it because its stronger due to taboo nature? I'm not a girl so I don't know what different arousal feels like for you

It's doesn't feel like real arousal, there's no attraction involved it's just kind of a response that makes me cringe but I still have a groinal reaction. I don't know if it's anxiety causing this but I hate it.

The fact that you say you couldn't imagine yourself doing that in person, disgusts you, and you were only doing it after the fact as a test suggests to me that you are not a pervert really. I imagine most people have had at least 1 family related dream in their lifetime.

@Shyfemale

One time i had quite a disturbing sexual dream and when i woke up i felt disgusted wondering why i would have a dream like that and enjoy it in the dream, 2 things may be happening here:

1. OCD consists of unwanted disturbing thoughts/images in your mind, sometimes everyday thoughts can appear in dreams and that's why you had the dream of it.
2. As ive said in other posts, ocd latches onto your emotional part of your mind and u begin to question it and almost think you enjoy it, i bet you had these:
Omg why did i like the dream am i sick? Pervert? Crazy?

The facts come down to the facts: It is just a dream. Dreams do not indicate situations in life nor make u capable of situations in life, you clearly found it disgusting and posted it here out of fear, so no. You are fine.