The question I would ask is, are you comfortable at that depth? Are you prepared to respond to your customer in the event of failure? Are they a TEC diver?
If you are not comfortable, don’t do it. If they are pressuring you, don’t do it. If they are going to be a liability, don’t do it. If you are not prepared to look into their family’s eyes and explain a the loss of a loved one, don’t do it. If you are unfamiliar with their skills, don’t do it.
PADI Code of Practice states "Put the safety of diving clients and students as your first priority and responsibility. In doing so, abide by the requirements and intent of PADI standards and procedures ....."
Ultimately, don’t put yourself and your family at risk if you have any question when taking on the responsibility of someone else.