If she was going to win this.. if she was going to find a way to really defeat Bellatrix, Tonks was going to have to understand her dear auntie. She was going to need to learn something about her and find a weakness.
"Now why wouldn't you enjoy my company? Out of your entire family I'm really the best when it comes to my wand. Gods, look at Draco. I'm surprised that my cousin can even tie his own shoes. And Narcissa? She doesn't know how to make a pot of tea. Whereas I, dear auntie, can fling hexes and curses and throw a punch. You should be proud!"