In my case, after talking to my partner about trying anal I used a water/castile soap enema in private- just to make sure everything was clean. He never suggested it, but I knew when and where we would be doing it. I never told him I did that either. You don't need much and it made me feel at ease knowing I was clean.
Maybe try to discuss that you would like to try it out. Maybe even suggest she do private reading etc if she wants to instead of talking to you about it.
Not that you two shouldn't communicate, because you should. But sometimes its easier to talk about after you've researched on your own time.