Sam Altman even said he want it to do adult content, as long as it is safe. So yes, that is a stated goal of theirs.
"we really want to get to a place where we can enable NSFW stuff (e.g. text erotica, gore) for your personal use in most cases but not do stuff like make deepfakes."
Also it's mentioned at the end of the article (where the background is dark): AI bots talk dirty so OnlyFans stars don’t have to