This has bounced around a lot. Maxa' put it up on a few places. I got it from her a little while ago since I really liked how she did muscular women and wanted a good action pic for Dee. Dee's kind of cheaty with the force of her jabs :)

It's downloadable with higher resolution over here http://dracos123.deviantart.com/art/First-comes-Jab-by-Maxa-art-621323820 with a bit more yammering. http://maxa-art.deviantart.com/ keeps doing pretty awesome stuff.

Looks like a fair bit of the tags got it wrong. She's a dragon-girl rather than a demon-girl. Like many OCs, there's a pile of other art about her over in my gallery. *goes to see about adding the right tags* :)