But is it really yours if AI is doing it for you?
It's very phylosophic question and nobody can answer it 100% correctly.
I'm watching for about a hundred adult artists and about 1/3 of them started to use AI in their work these two years.
And there is some paradox:
only small part of artists are using base txt2img generate pics. This pics you can easy recognise, if you ever seen SD- or DALLE-generated pics.
But the most of artists are using Adobe photoshop integrated AI or something the same to make some post-processing. Watchers usually didn't know about it, if artist didn't say it clearly, but it's using AI for pics too.
So, I think yes, you can create adult image or comix using AI, and it will be your's work. Because you spend the time, writing prompts, making drafts, generating plot of story in comix (or correcting another AI, who generated that plot).