I believe anon asks that because of the fact that many artists get in trouble on sites such as DA for drawing characters that are underage nude or in sexual themes.
Probably, but assumption is never safe.
With that said when you draw someone underage doing something sexual that is (in many places) considered child pornography. However if an adult is simply imitating, (or in our case cosplaying) then the concept that a child’s ignorance or innocence was being taken advantage of is lost.
We go through strict measures to ensure that our models are of legal age and the content we produce falls within legal boundaries.