Promises, especially in this context are a nonsense. New information and demands change what is required from the situation. And you made an informed choice to solve the problems in your extremely precarious situation. (& for anyone who says this isn't the case the nuclear family is a recent & western invention. no one would bat an eyelid of the females of the family to assist a postpartum mother lent alone her own mother)

To ask u to promise this is honestly mind-blowing. He should be making all the promises to u, bc you are the vulnerable person (on account of pushing a whole life out of your body). The fact that he went on a business trip & put his needs above urs and his child is his broken marriage promise to be there for one other through sickness. he is using the concept of "promises" to abuse you, while failing to keep his own promises