Since it clearly is connected to the trauma, another way to approach it is to simply acknowledge the part of yourself that wants to do this with the recognition that there is likely something triggering the early feeling of shame you experienced before. In truth you have one part that wants to indulge in the behavior and another part that feels the shame. If you can stand apart from both of them and explore the feelings underneath you may find relief.
oh wow.. that's a great insight Visitor! Going beyond indulging and shame without judging either part, creates the space to integrate both