"Karyn, I wish you'd become my asshole." Sarah giggled.
Suddenly Karyn found herself involuntarily walking around behind Sarah, who bent over and stuck out her ass. Karyn then placed her hands on the ground and lined her own butt up to Sarah's butt cheeks. She arranged herself perfectly and then the two girl's asses fused together.
This wasn't what Sarah was expecting at all! She tried to fart to see what would happen, and was a little weirded out when it resulted in Karyn belching.
"Ugh! Gross!" Karyn exclaimed, "It tastes like ass! Ick! My whole mouth tastes like ass!" Karyn tried to stand up, but found that she was stuck on all fours due to how she had been attached to Sarah, but every time Sarah moved, she seemed to have no problem walking backward along with her.
"Well, you are my asshole." said Sarah, "Maybe we need another wish to deal with this."
Karyn realized she needed to act quick. She realized that since she was a part of Sarah now too, she might be able to make wishes as well.
"I wish Sarah's mouth couldn't speak until I said otherwise." She said, and sure enough, Sarah was no longer speaking.