en_tn/2sa/13/32.md

Jonadab ... Shimeah

See how you translated these men's names in 2 Samuel 13:03.

Let not my master believe

"My master, do not believe"

my master

Jonadab calls David "my master" to show respect.

Amnon violated his sister

This is a polite way of saying that Amnon raped his sister. (See: rc://en/ta/man/translate/figs-euphemism)