In a moment of severe distress, a desperate attempt is made to prevent a horrific act through a careful blend of logic, appeals to honor, and alternative proposals. Tamar first focuses on the devastating personal cost of the impending assault, asking where she could possibly take and hide her disgrace [מצודת ציון]. She explains that even as a victim of force, a deep, inescapable shame would attach to her, a burden she could never bear or conceal from society [מצודת דוד, ביאור שטיינזלץ].
Shifting her focus, she appeals to his own sense of dignity [מלבי״ם, אברבנאל]. She warns that committing such a crime would reduce him to the level of the lowest, most degraded individuals [מצודת ציון]. A subtle nuance in her plea hints at a comparison to the worst of scoundrels, specifically recalling the ancient crime of Shechem. Yet, she emphasizes that this current act would be even more severe. While Shechem was an outsider, committing such an atrocity from within the nation of Israel makes the offense far worse [אלשיך, חומת אנך].
Realizing that her attacker is entirely blinded by lust and incapable of distinguishing right from wrong, she resorts to offering a seemingly practical way out. She suggests he simply ask the king for her hand in marriage, assuring him the request would not be denied. Commentators offer two distinct ways to understand this proposal. One perspective suggests that she was, in fact, legally permitted to marry him. Because her mother conceived her as a prisoner of war, Jewish law did not classify her as his legal sister [רש״י]. She reasons that although King David might have previously avoided the match due to her mother's lower social status, he would surely agree to it now to save his lovesick son from danger [ביאור שטיינזלץ, אלשיך].
Alternatively, another approach argues that she was strictly forbidden to him. According to this view, she claims the king would bypass the law to save his son's life, preferring to allow a forbidden marriage rather than watch him die of illness. However, her offer was merely a clever illusion. She had no real expectation of this marriage; it was a desperate stalling tactic designed entirely to delay him and escape the immediate threat [אברבנאל].