Most mainstream platforms and many jurisdictions have strict regulations against distributing pornographic or erotica - related content, so even if the PLR model is used, it may still be illegal. It's also important to note that ethical considerations should play a role here as well, regardless of the legal status in some areas.
In many cases, the legality of PLR erotic stories is very much in question. There are often laws regarding the distribution and creation of sexually explicit content, especially if it involves issues like non - consensual themes or is accessible to minors.
The legal situation is complex and varies from place to place. However, from a general ethical perspective, such content may not be acceptable in a wide range of social and cultural contexts. It's better to stay away from such potentially problematic PLR content.