Attachment insecurity does not eliminate the desire for closeness; it destabilises the capacity to tolerate closeness once achieved. This paper proposes Post-Rebonding Shame Collapse (PRSC), a descriptive framework for understanding abrupt relational withdrawal following renewed closeness in shame-prone, insecurely attached adults. Integrating attachment theory, shame research, and emotion-regulation findings, PRSC distinguishes capacity collapse from avoidance, disinterest, or depression. The model aims to reduce misattribution of intent and clarify why silence may reflect overload rather than rejection.