Dealing with my Dad's Girlfriend!

My father has been dating this one woman three months after my mother passed away from Ovarian Cancer. I'm trying to get along with her but she is so opionated. First she tells my father how to eat and dress and now she's telling me that I need to lose weight. The last straw was when she told me that I shouldn't take my nine year old son to New York for my mom's unveiling. I try to keep my distance and not to listen to her, but I just learned that on the return trip home (which is a three hour flight), my Dad has to stay in New York for business and I will be traveling alone with her and my son. I'm worried about how I'm going to get along with her. At least in New York, we'll be with family so I won't have to deal with her too much. I want to like her and I'm trying to but lately, she's been pissing me off. It's hard enough seeing my father with another woman, but this would be easier if this was someone I could tolerate.

What should I do?

Thanks!

Hi, mom2jared! Maybe if you stand up to her on something, she'll back off. You could tell her it's none of her business how you raise your son and let her know that your trip won't be pleasant if she doesn't stop being so bossy.
I'm sorry about your mother. Hopefully this woman will get the message.

In your situation I would have tell her tht you are mature enough to look after your son on your own..Not even your mother would have told you anything..because it is you business. (Always being polite)
Secondly, try to keep calm with your anger or you will get crazy..The best way to deal with people like that, is to treat them very well...If she say something bad to you or she is going to be rude, do not react but actually smile at her, use the politness..Is the best way, because she will thinks: why she is so nice to me..and trust me she will calm down..
Also speack with your dad..don't let this woman ruined the relation with your father, as in the end you still have him, a support..although the situation after your mother death has might been changed. No one better than parents knows you..