First, let me say, I'm very sorry for the loss of your mother. Now, on to the new girlfriend - your father likes her or needs her - otherwise, he wouldn't put up with her telling him what to eat or how to dress. That being said, you need to tell her, respectfully and calmly, that you don't need or want another mother. Tell her you know your father cares for her and you're happy that he has found someone to help him through this difficult time. But, tell her that you are an adult with your own life and that if you want her advice, you'll ask for it. Whatever you do, don't lose your cool or use strong language. That will just come back and bite you. Good luck!
I just want to know how to deal with her better!
I can't! My Dad made the reservation and there was no other flight that I could take. This is a small airport and they have limited flights.