Chapter 9! With a new mishnah too - on those whose crimes warrant execution, at this time, the death penalty is to be burning, including the adulterous daughter of a kohen. Plus, the man who sleeps with both a wife and her mother, as an example of other cases of incest that get the "burning" execution. And then Gemara works hard to show that the cases are learned from each other, via the use of an unusual term, as in promiscuity of "lewedness." Also, the prohibited liaisons are extended to both sides of the family, even if only by rabbinic decree. With a lot of attention to linguistic parallels to derive the laws.