There is one who performs one act of cohabitation and is liable for it to six chataos. He who cohabits with his daughter may be liable for her as his daughter, his sister, his brother’s wife, his father’s brother’s wife, a married woman, and a menstruant. And he who cohabits with his daughter’s daughter may be liable for her as his daughter’s daughter, his daughter-in-law, his wife’s sister, his brother’s wife, his father’s brother’s wife, a married woman, and a menstruant. R’ Yose says: If the [great-]grandfather transgressed and married her, he is liable for her as his father’s wife, and so is he who cohabits with his wife’s daughter or with his wife’s daughter’s daughter.

He who cohabits with his mother-in-law may be liable for her as his mother-in-law, his daughter-in-law, his wife’s sister, his brother’s wife, his father’s brother’s wife, a married woman, and a menstruant. And so is he who cohabits with his motherin-law’s mother or his father-in-law’s mother. R’ Yochanan ben Nuri says: He who cohabits with his mother-in-law can be liable for her as his mother-in-law, his mother-in-law’s mother, and his father-in-law’s mother. They said to him: The three of them are of one denomination.