http://scans-daily.dreamwidth.org/2773272.html?#cutid1
Bloodlines Outbreak was a miniseries DC ran in the '90s, about a bunch of alien monsters called Parasites who could assume human form. One of them, Lissik, is a seductress who takes the form of a beautiful woman and seduces people before revealing her true form to feed on them. There's some good shots of her changing in this issue.