unless you were planning to get out of town fast, why oh why would you curse someone by having them turn into something potentially dangerous to the entire community - including yourself!
Sandor asked her to leave, saying they were going to be in danger when the curse took effect, but she refused to leave because she said she had a way to protect both of them and wanted to stick around to watch Quentin destroy his own family one at a time. Sounds a lot like Angelique's logic when she placed her curse, don't you think?... and we all know how that worked out for her.
Now would *I* rely on a little silver pentagram to keep me and my loved ones safe from a werewolf? Hell no.