The woman who played Cindy really bothered me. I feel like she was not a great actress. Is this just me?

I think she was okay. Cindy was supposed to sound insincere when she talks to her husband; when she says how she dislikes him, I think the actress finds just the right tone.

By the way, she's a Buffyverse alumni: she plays the girl Spike fed on in CWDP and she was a girlfriend of Nicholas Brendon's brother, Kelly Donovan