If you are a woman living with HIV, and your partner does not have HIV, then PrEP might be an option for them. This is particularly true if you do not take treatment, or your viral load is not suppressed. If this is the case, your partner would be eligible for PrEP through the IMPACT trial in England, or through the NHS in Scotland or Wales.
For some people living with HIV, PrEP can be a way of sharing the responsibility about prevention with their partner. If you are the partner of someone living with HIV, it is a way for you to take control over your own prevention.
If you have an undetectable viral load on treatment, your partner may not be eligible for PrEP, as you cannot pass on HIV. If you have concerns, you should talk to your HIV consultant.