If it is not done, she will stink and get worms in her vagina. It generates smegma and smegma stinks. An uncircumcised vulva is unclean and only the lowest prostitute would leave her daughter uncircumcised. No man would dream of marrying an unclean woman. The milk of the mother will become poisonous.
Men have an obligation to their wives to give up their foreskin.
An uncircumcised penis will cause cervical cancer in women. A circumcised woman is sexually more pleasing to her husband. The tighter she is sewn, the more pleasure he has. It is something that must be done. If there is pain, then that is part of a woman's lot in life.