Good for you.
You have been well used by him and his ex, as is often the case when a new partner starts a relationship with a man with children.
You are seeing the real him now you are saying No.
Look closely at him and his behaviour, this is who he really is, petulant, entitled, selfish.
Completely unconcerned that his requests restrict your day.
Wouldn't dream of imposing on his father.
Thinks that every vagina in his vicinity owes him free childcare.
THIS is who he is.
He's a nag who will go on and on until he thinks he can get you to give in, just like a toddler.
Ick.
I would genuinely be concerned about being with someone with so little concern for you.
Be careful that you are not wasting your time with a user, living in your home, providing free childcare for him.
There is a huge imbalance in your relationship.
You are giving too much and making little of yourself in the process.
You need to look hard at him, what he brings to your table, and his reasons for being with you.
You deserve so much better than someone who is so utterly focused on YOU making HIS life as easy as possible, while he is utterly unconcerned about how you are impacted.
He is spectacularly selfish and just another avoidant father dumping his child on the nearest vagina.
Ick.
He works so hard and yet on a day when his child isn't around and he could do something nice for and with you?.....he's off to play golf for the day?
Wake up to just how selfish he is.
Well done for pushing back hard.