A total waste of taxpayer money. If this woman was selling them out on the street corner to 12 year olds I might care, but considering that the poice had to go undercover to catch her breaking any laws is just ludicrous. This is yet another one of those laws that is on the books under the auspices of "public safety", yet seems to only apply when nobody is actually being hurt, by any means.
Not to mention how expensive undercover work is. The man hours involved, the equipment, surveilance, etc. It all comes out of the taxpayer's pockets. And like people have said, it takes cops away from other, trivial jobs, like stopping murders. :|
EDIT: Oh yeah, not to mention that this thing happened in a private home. Now if this was a drug deal or something, yeah, I could dig it, but there are numerous provisions, federal and state, that prevent the enforcement of laws like the infamous Texas anti-Sodomy law. Selling sex toys isn't exactly the same, but it's sure close.