Scorpios brought up a good point. If it were the end of your session and T says, "ding" times up , in the middle of a thought , then how would you feel? What if you were the client who was getting the 3 minutes? Chances are it will happen as therapy is a strange beast and the ability to "wrap things up" on the hour sometimes is not possible. It doesn't mean that your T cares for that patient more or you less, it means your T is being responsible and wrapping it up for the previous patient before she sends them on their way. Now if it were 10 minutes back to back , then I would say she needs to judge her time and clients better, but 3 minutes? I realize this has triggered some of your own stuff regarding being cared for and things, and it appears you have owned that. Just try to be aware that you are not the only client and if she affords others time to "wrap it up" at the end, then she will probably do the same for you when the time comes. In other words cutting into your time, wasn't about you.