My Step Aunt is DTF - Down to Fuck!

I ran into my aunt tonight at the store. I call her my aunt, but she's my stepmom's sister. She is super sexy, and I've always thought I was her favorite nephew. When I ran into her, she asked if she could come over and catch up since we hadn't seen each other in a couple of years. She asked how old I am now and I told her 18 and lived on my own. She was super eager to come over and see my new place. I was a bit nervous because I've jerked off thinking about since I can remember. I stole a pair of her panties once when she stayed with us over the holidays. She came over, and we chatted for a few minutes. She said that she used to date my dad and that I look like him but hotter. Next thing I know she has my cock in her hand and is pulling down her dress and showing me her amazing tits. Jerking off and telling me to cum for my auntie. She used both hands stroking me perfectly keeping wet by spitting on it. She got completely naked and showed me her pussy while jerking me off until I came. Then she told me not to mention anything to my mom and dad and left. I don't even know what just happened?