My (m40) bestfriend (MtF 27) sucked my cock

I met my friend four years ago, and she had already transitioned by then. She's been using hormones since she was 16, she still didn’t get surgery but it's almost impossible to tell she's a trans woman. I've always found her very pretty, but I've never made a move on her because I cherish our friendship so much. Last week, we went out for drinks at a bar near my place, and at the end of the night, we went back to my place to continue drinking, talking, and singing. It was a lot of fun, and I set up the guest room for her to sleep over. In the middle of the night, I woke up when she slipped into my room and gave me oral sex. When she saw I was awake, she smiled, put a finger to her lips, and continued giving me oral sex without a word being exchanged. I finally came, she swallowed, and left my room without saying a word. The next day, I drove her home after lunch, and I didn't dare talk to her about what had happened, and neither did she. It's been a week now, and all our conversations are the same as before, without us having discussed what happened. I don't know if I should talk to her about what happened…