As the aging king’s health declined, a beautiful young woman was brought to the royal court to fulfill a specific medical and physical need. Her duty was to lie in the king's bosom and provide him with essential body heat, serving him with the intimate closeness of a wife [אברבנאל, רד״ק]. This role involved directly warming the king's body [מצודת דוד], rather than acting as a mere administrative caretaker of the royal treasury. If her position had been purely managerial, the later request by the king's son, Adonijah, to marry her would not have ultimately cost him his life [אברבנאל].
Despite the deep intimacy of this arrangement, the king did not engage in sexual relations with her [מצודת ציון]. Commentators offer several explanations for this restraint. One approach suggests that the king was simply too old and physically frail [ביאור שטיינזלץ]. Another perspective highlights a practical medical strategy, noting the belief that a virgin could generate and transfer body heat more effectively, making it necessary to preserve her status [רש״י, מצודת דוד, רד״ק]. Beyond these physical considerations, a strict legal barrier prevented any further relationship. According to the Sages, Biblical law restricts a king from taking an excessive number of wives. Because David had already reached the maximum permitted limit of eighteen, it was strictly forbidden for him to marry her [רש״י, מצודת דוד, רד״ק].
The fact that their relationship was never consummated carried profound historical and political consequences. Primarily, it established that although she shared the king's bed, she remained legally permitted to marry his son Solomon in the future [רד״ק]. However, the king's restraint also inadvertently served as the catalyst for Adonijah’s rebellion. Observing David’s physical boundaries with his new companion while keeping his other wives, Adonijah mistakenly interpreted the king's behavior as an act of severe self-denial. He assumed his father was actively suppressing his desires as penance for his past sin with Bathsheba. Following this logic, Adonijah concluded that Bathsheba must be forbidden to the king, which would inherently disqualify her son Solomon from inheriting the throne. Emboldened by this assumption, Adonijah moved to seize the crown for himself. Upon recognizing the root of Adonijah’s rebellion, David took decisive action to dismantle the false narrative. He resumed relations with Bathsheba to publicly reaffirm her status as his legitimate, permitted wife, and he formally renewed his oath to crown Solomon, permanently securing his son's succession [צוארי שלל].