Originally Posted by
joypulv
I gave you one example of a catty response. Any more are up to you!
You sound like you let her go on and on. Try to force yourself to stop her from now on. Hang up or walk out or change the subject. Have a key phrase that you use each time, like you are training a pet. It could be just the word STOP said emphatically. You could add a short sentence such as "Life isn't all about you" or "My turn." Then start talking about you or something else. You could even reward her when she can go an hour without monopolizing. Say "That was an actually fun time, sharing talking back and forth. Let's go to dinner."