20 M4A An incident involving my step-aunt has really confused me. Is there anyone who can help?

One day I came home from outside and my aunt was there. I went to say hello, and when she saw me, her speech quickened, her breathing became faster, and she kissed me on the cheek and then hugged me. She hugged me so tightly that I could feel her breasts against my chest. After our hug, she immediately sat down in her chair and started adjusting the straps of her dress and rubbing her legs back and forth with her palms as if scratching them. She complimented me, saying I'd lost so much weight and looked so handsome, and she was doing the things I'd described. Then suddenly she changed the subject and started talking about something unrelated. I left that room, but I was very aroused. My penis was already erect from hugging her. After our conversation ended, I went inside and stroked my penis. Then I went back to her. My penis wasn't fully erect, but it was slightly erect. I don't know if she saw my erect penis, but when I went to her, she said, "I should go, it's getting late," and went home that day.