From arrangement to relationship?

What does one do if you fall for someone? I realize I am married and doing something inappropriate to begin with. By placing a sugar daddy ad on the Internet and meeting these ladies it is understood that this is a business arrangement of sorts. You get to meet some people that are interesting, others that are totally boring, others that are visibly uncomfortable being there (why did they bother responding in the first place anyway?). But some are really nice, there is a mutual attraction and a match, and I wouldn't mind hanging out with them. That is the most dangerous situation: mutual 'like' which under different circumstances could even lead to a relationship. Note to self: try to always remain really level headed and don't forget who you are, who they are, and why you are all there.

Examples:

Serena is one example. Maybe because it started as a non-sugar type of meeting, so some of the sugar game face was off on that occasion. But at some point she felt attracted to me. I could tell because this is one of the normal aspects of human behavior: a person can tell if someone of the opposite sex is attracted to them. Why was she attracted? well, she said she was starting to get interested in men of my age group, as she found men her own age a bit shallow and having nothing interesting to talk about. By contrast someone older who has had many experiences may prove more interesting. I was attracted to her because she was so easy to talk to, and somehow she was able to gain my trust after a just a few dates. Why? Just the way we interacted and talked to each other, and just being interested in hearing each others life stories. This really reminded me of dates in the pre-sugar days.
Was this a dangerous situation? the only concern I had was whether she would try to get back to me when we broke up. So here is the nightmare scenario: That she would somehow get a hold of my real address or phone number at home or at work and harass me in some way, or cause suspicion with my family.

Other examples of a 'sugar' situation turned into something more:

The friendship I developed with Tina. Mind you, this was not an emotional think like it ended up being with Amanda or Malone, bit more like a friendship as if she was one of the guys. Since we both have a child around the same age (she has a 7 year old son) we could relate at a certain level. She could talk to me about various issues she is facing and would immediately understand because chances are I been through a lot of that as well. So after having these great chats we developed something beyond money, gifts and sex. No wonder her parting words to me after I moved up North were 'I will miss the friendship. Sex was great too, but I will miss you being my friend and having someone to talk to'.