Mostly because she's quite bemused, and sometimes confused, by my attempts, and some of the teasing is directed at me from giving her more attention than other drivers. I learned today that she doesn't read lips either since she's only ever really used sign language in school and in private. Thankfully (For me) she's good at shaping words, so I can read her lips more than try to follow along her blisteringly fast signing, since I'm hearing impaired I've always used lip reading as support for my bad hearing.
That said, with the exception of three coworkers, 9 are young enough that I could've been their father without breaking any laws. Edit; Thankfully, they aren't childish enough to make fun of someones disability, except ribbing me a bit when I can't hear what the F they are yabbering about over the radio. 😄