I (24F) create adult content online under a pseudonym. An engaged, family friend (31M) found me.

So I have been making NSFW videos of myself for a few years for extra cash for school. A few of my very, very close female friends know about it, but otherwise it's not something I share with people in my real life. I started doing it when I was 20, and I've gained a small following. It's something I do on and off on various platforms, but more frequently I make custom or private videos for people who have been following me for a long time. I am very careful to stick to my fake name and persona, as well as only connect throwaway email addresses to the platforms I use.

A couple years ago, my older brother's best friend stumbled upon one of my platforms. He recognized me, and started paying me via my platforms for premium content. I had a conversation with him on my real Instagram to tell him that it was fine if he stuck around, but he could not share with my family or anyone associated what I do for money. Additionally, not to use my real name or any of my real identifiers (age, university, location, major, etc) in groups on my platforms. He agreed. Fine. At the time, I knew he had a girlfriend, but I considered it like any of my other viewers/clients - I am not responsible for it.

He soon started requesting private videos - and paying a hefty chunk of change for it. While he initially used the links on my platforms to pay me, he started paying me through my personal venmo account. Additionally, he started talking to me on my personal social media about school, politics, my life, whatever. He sends me videos of him jacking off to my videos to my personal snapchat, saying my real name. Obviously, I should have set a clearer boundary - and I know that now. At the time, the money was so good, I let it go. He started requesting videos over my personal snapchat frequently and I have obliged. This has been going on for about a year and a half, and he is now engaged. I feel icky. He's interacting with me as a person, not my created persona. Is this cheating? Should I tell her?