I had this same problem this week with T. She forgot two pretty important things that we have discussed multiple times. She apologized repeatedly because after I reminded her she remembered our previous discussions.

A couple of years ago I got really upset when she didnt know somethkng BIG. I ended up writing to her and explained why it bothered me and gave it to at the next appointment. She handled it well and we discussed it.

Now I realize, she is human and forgets things just like I do. If she realizes it appologizes we move on and we are typically fine. If it bothers me I talk to her. She wants me to tell her if she messes up so she can try to do better.