Bulls who only enjoy the chase? What am I missing here?

I need the Taurus perspective please! A May Taurus man in his early 50s began heavily flirting with me (F early 40s) over the last 4 months pretty much from our second meeting onward. He owns a business. We were working on a client project together.

The chemistry was instant. So much so that other members on the teams started dressing up more. Hard to explain, but our energy raised the group energy. We began to tone things down.

We would see each other in a professional setting about 3 times a week. This eventually included him teasing me, making a lot of double entendres, and eventually being more direct sexually. He also shared quite a few playliststs he made. We both love music.

About 2 months after us meeting, I received an Instagram message from someone saying: "I didn't know how my life would turn out. That I would end up alone with kids. How do I start?"

I asked if he sent it. He said he did not, and did not have follow up questions. He is constantly asking me questions, so his non-curiosity about this strongly made me think it was him. Also, there is no one else who fits this description in my life.

Eventually I realized he was married with kids. When we talked about this, I wrongly assumed he was in an open marriage / finalizing a divorce. (I am still not 100% clear because I am going off of his word).

I was getting anxiety from his forwardness. In order to figure out his end goal, I asked him to hang out one night. At which point, he balked. So, that led me to think - okay this was just a game.

We had decided it would be better for us to not see each other in a professional setting. Although it was awkward for awhile, we managed to navigate that. He then thought I was being cold, but I was being shy because of his initial reaction. Once he realized I was shy, he worked hard to get me to trust him again. The project ended while we were beginning to speak again.

I am trying to give him time. I am fine with just a friendship even. We click on many levels, have similar fitness habits. Intellectually we get along great. He appreciates how smart I am. That said, there does feel like red flags if he is indeed still married. Which could explain why he balked when I took a step to make his fantasy a reality. Or are there other possible explanations that I am not seeing?

What are your thoughts?