Practice your communication skills. If you can’t think of a way to phrase advice that might be offensive, you are failing in intermediate communication skills.
If you think it might be offensive, ask a close female in your life, your sister, your mother, grandma, etc.
It’s in everyone’s best interest to treat others with love and respect.
For extra safety, if you really think there is a risk, actually record the audio encounter for back up.
If you actually go through these steps for building towards good communication, it’s highly unlikely you would ever have to use the recording in defense.