"It is better to borrow a house to mourn than to borrow a house to become a couple." What does the "double" in this sentence mean?

"Better to borrow a house to stop mourning than to borrow a house to become a couple" means a hypothesis, that is, you can only choose one of the two "borrowing a house to stop mourning" or "borrowing a house to become a couple" Under such circumstances, it is better to choose "borrowing a house to stop the funeral" than "borrowing a house to make a couple".

Neither is a good thing, they are both things that were avoided in rural areas in the old days, and both will bring bad consequences to the family. It's just that the consequences of "borrowing a house to make a couple" are much more serious than the consequences of "borrowing a house to stop the funeral". Under the influence of people's psychology of seeking advantages and avoiding disadvantages, if you have to choose one of two things, and there is no other choice, you have to choose "borrowing a house to stop the funeral".