Nah, it'll be fine. I just visited the Victoria's Secret website, and it's not an R18+ site. It's goddamn lingerie, not sex toys or whatever. That's fair game in my books. In society's books it seems, too.
Nico, you should set out a template or something ( you'll want to think about dimensions, main image, text, etc) when offering to make sigs. Makes things a lot easier for the sig-maker, or so I've seen. If they don't follow the template, no sig for them. ;]