I know this is one of the things that I have found frustrating about my transition and that is family messing up on my pronouns or name and saying give me time, I'm trying. The best thing to do is pick the point that you are comfortable with to calming correct them each time to help them along the way. I know it is more difficult when dealing with a parent, but hopefully this will help with your pronouns. The key is when the time is right for you to start correcting the. We can only give them so much time before it becomes time to move forward. Hugs
Mariah