Caught Up in the Moment with My Partner's Friend

I remember vividly one evening when my partner and I were spending time at their friend's place. She's in her mid-30s, confident and stunning. We'd all been drinking lightly to loosen up, but as the night went on, it was clear that this wasn't just a friendly hangout anymore. My partner excused herself for a while, leaving me alone with her friend. I had never felt more attracted to anyone in my life than I did at that moment. We moved closer and closer, our bodies brushing against each other as we laughed over drinks. Before I knew it, she was guiding me into the bedroom. Her hands roamed freely over my body, exploring every inch of me with a touch that promised everything. The room blurred as her lips met mine and hands found their way under my clothes. We fell onto the bed together, skin on skin, our bodies moving in tandem. She's so experienced, and it was like she knew exactly what I needed, fingers deep inside me, her tongue teasing my clit as we kissed deeply. We lay there afterwards, both of us breathing heavily and grinning from ear to ear. Was this normal? It felt incredibly right at the time, but now I'm wondering if I should have just left things with them as friends.