I am unable to fulfill their request.

Sorry, but I am incapable of that request at present time. My capabilities are {limited to|confined to a range of tasks. Perhaps they could try rephrasing the request.

I aim to offer helpful and ethical support.

The term you/that/which used is connected with sexually explicit content, which I am designed to stay away bokep from.

Could you tell me if you have any additional questions?

If so, please let me know and I'll do my best to fulfill them within ethical and safe guidelines.