My Secret Passion

I've been married to Sarah for ten years now, and we have a wonderful life together. But recently, I've started exploring kinkier fetishes with her that involve roleplaying as a dominatrix or submissive. It's all consensual and incredibly exciting for both of us, but sometimes I worry about how far is too far when it comes to these games. Has anyone else experimented with this level of intensity in their marriage? Is it common to have such playful power dynamics in long-term relationships?