My Patient's Secret Wishes

I'm a nurse in my early 30s, and I never imagined myself as someone who would engage with a DDLG dynamic. But one day, while caring for a patient who was going through a rough time, she confided in me about her secret desires, fantasies of being taken care of like a child again. We started exploring this together in our professional capacity, keeping it strictly confidential and consensual. It brought us both unexpected comfort and closeness, but I'm starting to feel overwhelmed by the emotional intensity. Is what we're doing unusual or is there something more to explore here? Am I crossing any invisible lines?