In Wambang 25, Sinn Sage gets covered in pink and purple slime while masturbating. This was the first time she had ever been pied and her reactions really show it. She flinches a lot and tries to block her face with her hand a couple times, then has a laughing orgasm at the end.
You know I looked at the pics on the archive page and thought "boy, that looks a lot like Sinn Sage, but it can't be, she doesn't do WAM scenes?" Glad to be proven wrong! (If you shoot w/ her again, tell her some random guy on the internet said he loves your work.)