What is "Beis Adonecha"?
Radak: When Ish Boshes died, David inherited Sha'ul, like I explained (refer to 9:7:2:2,4).
Who are "Neshei Adonecha"?
Rashi: It is Michal.
Radak #1: It is Eglah, Sha'ul's wife 1 , and Michal, his daughter.
Radak #2: Perhaps David married also Ritzpah, Sha'ul's concubine. 2
Malbim: All of Sha'ul's wives [are permitted to you]
Why did he say "I gave to you Beis Yisrael and Yehudah"?
Malbim: You may take women from what you desire.
What is the meaning of "v'Im Me'at"?
Mahari Kara: If your master's wives were few in your eyes.
Radak: Had you stood [refrained] and not sinned.
What is the meaning of "v'Osifah Lecha Kahenah v'Chahenah"?
Radak (5:13, citing Sanhedrin 21a): I would add to you [six] like these (David's six wives in Chevron mentioned above) and like these (another six. We learn that a king may marry only 18 wives.)
Radak: I would have added to you much more honor and grandeur.