Confused and horny, and desperately in need of advice.

In summary, my mum has been staying at my house for this past week, and on the weekend, I went out with my mates and got a little drunk (and horny). I got home and decided to play with myself a little and watch some porn, and I guess I was louder than I thought I was (I may have forgotten to put AirPods in too)

after I climaxed, I walked into the living room where she was sleeping and I could see her clearly masturbating, I just crept back to my room and I do not think that she noticed me

I have been thinking about this ever since, and I did not think that I had any interest in incest but this has me so turned on and I keep on replaying this in my head

Please help