I'm going to make jokes/comments about my roommate being sick
I'm quite confused, why are you going to do that? Are you angry with her?
She's a very unpleasant woman and has argued with me many times.
She could be unpleasant because of her sickness. You should help them through this sickness now so that you can once again be friends with her in the future.
That's ridiculous. I am going to make jokes until she learns not to do this again.
If you know she is sick and you know that she's not doing it on purpose, then I feel like it is really unethical for you to make jokes about her that way. Try to just ignore her moving forward, if you're deciding to not help her cope.