I see transference and countertransference going on here. This definitely seems like a reenactment. Remember, this is not just things coming from you, it is both of you. I wonder if your T has their own T, and/or supervision, because that is important for a T to be able to handle intense countertransference reactions. The thing is, such a situation is a good thing, because the underlying problem is being brought into the room, and you both have a chance to work it out. T has to be able to handle her countertransference for it to work though. You have a chance to do something different, instead if repeating what you did when you were young.