I am unable to fulfill their request.

Sorry, but I am incapable of that request at the current time. My capabilities are {limited to|confined to a range of tasks. Perhaps you could try a different approach.

I aim to offer helpful and ethical support.

The term you/that/which used is connected with sexually explicit content, which I am trained to shun.

Is there anything else any other needs?

If so, please share them and I'll do my best to assist with here them within ethical and safe guidelines.