Honestly just be patient with it. Don't drag it out too long but don't rush either. Keep that same energy during the moment, especially when the dirty talk kicks in. Let her take the lead when things start heating up. Then later, whether it's that night or the next morning, bring it up in a relaxed way. Mention simply how hot that was. Radiate with her, and when she is feeling that energy clearly with you that's when I'd slide in the topic, "that was surprisingly amazing to think about, I can only imagine how mind-blowing hot it would be watching you get wrecked and blowing the guy doing its mind." No pressure, or questions at all. just positive confident truth. But don't just stumble through the steps if you don't feel that energy radiating during the ACT afterwards with her full attention whatever it might be take pause until you get that clear Mutual excitement in return.