(Well, if this doesn't cure Myra's fear, Shara's going to do something mean...)
Shara
"Yes," Shara said.

Myra threw up, now green.

(Commence the meanness. But make it so Myra can forgive Shara later.)

(It'll be a simple, practical joke...)
Shara
While Myra was looking away, Shara turned into a spider anthro.

Myra looked back at Shara and screamed, backpedaling.

Muffet giggled.

Shara
Shara shifted back, and hugged Myra, saying, "I'm sorry, Love."

Myra sniffed and hugged her back. *its ok. My arachnophobia is pretty severe.*

(I've got a more subtle way to fix it, too...)
Shara
"What if I could cure it?"

Myra sniffed. *iv had it since I was a little kid. How would you do that?*

Shara
"To answer that, I first need to tell you a story. When I met Darius, he was terrified of heights. I was able to smooth it out, and get rid of it."

*how?^