Rashi on the Former Prophets

Avsholom had a pretty sister. That was the daughter of his mother.

To [the point of] sickness. Until he became sick.
Because she was a virgin. She was modest [and stayed] in the house and did not go outside therefore, "It was hidden from the eyes of Amnon… It was covered and hidden from him. What excuse he could seek [in order] to lay with her. Similar to "When it is concealed from you", [which] Onkelus translates: "When it is hidden from you."

Smart man. For wickedness.

Weak. Weak as [we find] "weak and bad [in] appearance".

The meal. The meal.

She made a paste. She made a paste of flour mixed [it] first into boiling water and afterwords in oil.

The pan. The [Onkelus'] translation of Machues is "pan".

Because he will not keep me from you. I am permitted to you because my mother became pregnant with me when she was still a gentile, pretty woman that Dovid took conjugally in war. And someone who has a son or daughter from a gentile handmaid is not considered his child for any legal matter.

Amnon hated her. Our Rabbis say she tied a hair for him [in his genital area] and caused him to have a severed organ.

Do not do this thing. Do not do this evil thing of sending [me] away which is worse then the other [evil thing] that you did to me. You raped me and then you added on more evil than that by sending me away.

The were shearing. It was there custom to make a party when they sheared their flocks.

Will not come with us. If you can not go, let Amnon go with us.

This has been Avsholom's order. By Avsholom's command was this order bestowed on his servants to kill Amnon.

Dovid desired. This is a shortened verse, [it means to say:] "Dovid's soul desired." Yonoson also translates [this way:] "Dovid's soul desired," as [we find:] "[My Soul] yearns, and even pines." Language [denoting] desire.
Because he was consoled concerning Amnon. He accepted [words of] consolation.