He has just recently divorced his wife and has a child. He should be primarily focused on navigating the world as a single unattached person and focusing on his child.
There hasn't been enough time for the both of them.
You two are incompatible and in an unhealthy dynamic.
You have been on and off with a recently divorced man who has a young child for a year...neither one of you are ready for a relationship nor should be discussing these types of plans.
You two don't even have stability in a relationship..
Also, you were involved with him while he was legally married??
You are perhaps a rebound.
You are desperate for children and marriage, and seem to be in a rush for both which is why you are willing to settle for anything and anyone.
You two are incompatible. There is no stability within either one of you individually, nor collectively.
There's no way that you should be swooning over a guy that doesn't care about the emotional mental and overall health and well being of his child..he should be prioritizing that, instead of trying to force a situation and a stranger on her. She hasn't had much time to adjust and adapt to the divorce, and what comes with it...but here he is discussing marriage, house, children plans with someone else and in this short time frame.
Leave.
Work on yourself perhaps in therapy.
It's better to be single than to force yourself into a situation that has been presenting major red flags...just so that you finally become a mother and become a wife.
It's not going to work out.
Do not intentionally bring children into a disasterous situation, with both or one person together only out of desperation.
Perhaps in the future if you decide to date again(after working on yourself perhaps in therapy) don't date men with children at all, or who are emotionally and mentally unavailable...who are recently divorced. Don't settle for anything.
There are billions of people in the world who are suitable candidates, pick one.
Don't pick and stay with anyone just because you're desperate to become a mother and wife.
Love and respect yourself.
Everything you wrote are humongous red flags.