Okay. You feel obligated to speak with her, but right now it feels like a risky chore. She might be hurtful, and she will be boring.

With regard to the boredom: what if you ask her about what you want her to speak about--your aunt, your cousin, her proactivity. Even if she is not proactive, by asking her about it you plant seeds.

How about her work, could that be interesting to hear about? Her tastes or suggestions in music? Just as an idea: maybe she can tell you some music that her students are working on, and you can listen to someone perform it online, eg on youtube?

With regard to her making hurtful comments: this is where radical acceptance can really come in handy. This is how she is: clumsy sometimes, perhaps irritable, overly interested in you, intervening. Maybe you can come to accept that she is going to say these things--and maybe you can decide that they don't require a response? Maybe you can allow them to fly by as she moves on to the next topic?