Conflicted Moments in My Open Relationship

I recently had a session with one of my patients who is quite charming and confident. We've always maintained professional boundaries, but there was this one moment where the conversation veered into more personal territory. I found myself getting lost in our exchange, feeling something stirring inside that I hadn't expected. It's not like it hasn't crossed my mind before, we all have fantasies, right? But actually acting on them is another thing entirely. Does anyone else deal with these kinds of situations and still maintain professional integrity?