Daughter, boyfriend, mom and dad came to the woman's house for the first time to propose marriage.

When the daughter's boyfriend's mother and father came to the woman's house to propose marriage for the first time, the following are some possible topics and communication methods:

1. Greeting and introducing each other: Both parents can greet each other and introduce themselves. They can share some things about their families in order to get to know each other better.

2. Discuss the relationship between daughter and boyfriend: Parents can talk about the relationship between daughter and boyfriend, including how they met, how they got along with each other, and their future plans.

Family background and values: Parents can share some information about their family background and values. This helps each other to better understand each other's family culture and values.

4. Discuss the details of marriage proposal: The parents of the man can ask the parents of the woman about the details of marriage proposal, such as bride price, dowry and so on. The woman's parents can also explain their requirements and expectations to the man's parents.

5. Discuss future plans: Both parents can discuss future plans, such as wedding arrangements, new house decoration and so on. They can discuss these problems together and make corresponding plans.

6. Thank you and say goodbye: Finally, both parents can express their thanks and blessings to each other. They can say goodbye and make an appointment for the next meeting.

In short, when the daughter's boyfriend's mother and father come to the woman's house to propose marriage for the first time, both parents should be sincere and polite and establish a good relationship. They can talk about some relaxing topics so as to get to know each other better and discuss the details of the proposal.