First of all, you are older than him. Parents generally want the woman to be younger so that the man can have the right to speak. You are two years older than him, and both social experience and life experience make his mother feel that you have the upper hand over his son. So single mothers are very unhappy. Everything she does tells you that she is the master of this family. Whether you are a girlfriend now or a wife in the future, this will not change.
Secondly, the tension between mother-in-law and daughter-in-law is because she has raised her son for so many years and suddenly fell in love with someone else. Mom must be very jealous, plus it is a divorced family, and the son is the mother's all, which is the mother's all spiritual sustenance. How can she stand watching the sudden arrival of a woman caressing her son and holding hands to feed porridge? And you said, "Her boyfriend usually holds her and spanks her. She is very happy." This is her happy moment, but she can't stand her son doing this to others.
In fact, his mother said that she would get married at least three years later and earn enough money to decorate her new house. If you want to back down and get married three years later, you will know that you can't afford it. Look at his attitude. He doesn't even dare to hold hands with you in front of his mother. After the quarrel, you can only go back to your mother's house.
A man who can't protect you, don't get married Otherwise, you are too isolated in this marriage!