My Secret Bondage Sessions with Mia

I've been Mia's Daddy since we met two years ago. She's a sweet, smart girl in her twenties, and our relationship is built on mutual respect and trust. We started out gently, role-playing scenes where she would play as my daughter, seeking guidance and protection from me. Over time, I found myself craving more control over her and the intensity of our interactions increased. Now we regularly indulge in intense bondage sessions where I tie Mia up and discipline her with a belt when she does something wrong. It's all consensual and she enjoys it deeply too; but seeing her restrained and submissive tears me apart emotionally. Her trust in me is overwhelming, I feel so responsible, yet at the same time strangely empowered. Am I just sick for enjoying this? Or could our dynamic be truly healthy, as long as we both consent fully to every detail of what we do together? Would love some feedback from others who understand these dynamics.