Caught Up In A Taboo Fantasy Roleplay

It started a few months ago when my partner and I were exploring new kinks. We've been together for two years now, our relationship is solid, but we both crave something more adventurous and challenging. Lately, she's had this fascination with the idea of her being in an abusive relationship as part of roleplay scenarios. She wants to explore how it feels to be dominated and punished by me. At first, I was hesitant, but seeing her excitement and knowing that it’s all consensual made me reconsider. We set some strict boundaries, no real physical harm, clear verbal cues for stopping if anything feels wrong. As we delved into these roleplays, they started to feel incredibly intense, almost like a switch flipped in both of us. In the heat of the moment, I find myself pushing her limits more than intended. The power dynamics are exhilarating but also terrifying. One night, after one particularly steamy session, she mentioned how it felt real, as if she could see herself in that kind of abusive relationship outside our roleplay context. Her words left me reeling, was I becoming something dark inside these games? Could my need for control be slipping into the rest of our lives? I’m not sure where to draw the line anymore. Am I overstepping with this kink, or is it normal that these fantasies can blur into reality? How do we keep this exciting without risking actual harm? It’s all consensual, but there’s a fine edge between play and peril here. Help me understand, am I the asshole for letting this go too far?