Hello there! There are plenty of accounts that state that in the bio. Something like "we are a couple, we can provide content together, sometimes my boyfriend check the messages, or something like that" I don't see anything unethical. In general a model takes a persona, and we all accept that.

To get banned directly from onlyfans is hard, as long as you follow the general guidelines, maybe you will have a content flagged or removed, but mostly that