1)
What if the wife of the adulterer's father is not his mother?
1.
Targum Yonasan: The Torah writes "Eishes Aviv", irrespective of whether she is his mother or not.
2)
Which of the four Misos does one receive for Eishes Av?
1.
Sanhedrin, 54a: We learn via a Gezeirah Shavah "Demeihem bam" "Demeihem bam" from Ov ve'Yid'oni in Pasuk 27, that Eishes Av is subject to Sekilah. 1
1
Where the Torah writes specifically "be'Even Yirgmu osam".
3)
Why is Eishes Av mentioned next to Eishes Ish?