I have a cousin who dated a man with kids. For years. One time she called me in tears. He wanted to get married, but, "I hate his kids," she sobbed.
Fast forward a couple of years. They get married. Fast forward a couple of months. The older one is booted out of the house to go to college (she and her now husband did not pay for it even though both of them had their college fully subsidized by their parents), and the younger one is sent to live out-of-state with friends.
To my mind, your honesty is refreshing. Both of his children have had to live with this for over 25 years now, and frankly, it wasn't fair to them.