Its under stable why you feel hurt and betrayed. L should not have contacted anyone without your consent. It sounds to me like a lot of boundary violations are happening. L seems to have violated your boundaries around contact with your family. I am also confused as to what any of this has to do with your sister and the card. L should have mailed it to you or given it to you in a session, plain and simple. It also seems like you guys are on a slippery slope with what a therapist should and should not do as a paid professional. If you choose to keep working with her then I think its important to plan and write out what the boundaries are between the two of you and how they will be followed in the future and how to keep this line from getting this blurred between you. As for moving on from it, talking about it with her, writing her a letter you could or could not send to her expressing exactly how you feel, and then deciding if you want to forgive her and try to move on or if that's not possible and you move on to another therapist. This is still fresh so try to let some of the strong emotions settle before making a big decision when you have had time to really reflect and decide what it is you want. It seems you spend a lot of time on issues with your therapist than anything else and if a therapist is not crossing that ethical professional line then you wouldn't get hurt so much and spend this much time and energy on this stuff. I have been burned by a therapist who was not ethical and crossed many lines and I would have given anything for someone to point that out to save me from future hurt. Whatever you decide I wish you the best of luck.