AITA for thinking that my dad's Girlfriend is a gold digger?

[18M here, sorry if its a bit all over the place]<br><br>My mom passed away 5 years ago, it was really hard on the whole family. My dad is a very close friend with mom's sister, "Pam" and her husband "Paul" and "Aunt Pam" really helped dad get over moms death. <br><br>We all live in Florida, nothing but snowbirds and retirees. My dad is 55 and has been pretty lonely since mom died. He didn't really "date" anybody until a few months ago when he started dating "Carla". One thing you should know is that my dad is very wealthy. Not millionaire wealthy but he's definitely in the top 1%. Both of my grandpas were wealthy in their own rights and my dad inherited their wealth (he works as well but the inheritances really helped). Our house is huge, both of my sisters have new cars and my dad doesn't really worry about money that much, since we're all set for life. <br><br>Carla is 26, which is young enough to be my half-sister. From what i can tell, she doesn't really have a job. She works at Nordstrom part time and she sells clothes she finds thrifting on Depop, but somehow she has 3k Gucci hand bags and 1k Lululemon leggings. She's been greedy since day 1. The first time we met she was asking about our house and was it "ours". I guess it wasn't really weird because she had just met my dad and is a fresh relationship.<br><br>I don't want to repeat all of her "odd" behaviors, but here are the main ones:<br><br> 1. She wanted me to show her my car and asked me where I got it and how much it was. She pulled the exact car in a different color from the dealership the next day. (It's a 2022 GTI which is a pretty expensive car, especially considering that my two sisters have Gti's as well) <br> <br> 2. She's not even done with her car. Sometimes my dad drives her car and she'll say stuff like "oh you're so lucky you get to drive my car" its honestly really weird. The car has been ordered since December and isn't supposed to arrive until June so she still has a few months until she has it. She's already selling the car she currently has because she thinks my dad is going to buy her the car (I don't know if she's joking or not) but she wants my dad to pay her out for her current car (which she has already sold) so she can use it as a down payment for her new car. My dad said she is insane and that he's not going to pay her for her car so she should've kept it.<br><br> 3. She called me a "spoiled rich kid" when I wouldn't drive her to the grocery store. I had plans with my Aunt Pam and she kept making comments about how nice her (my aunt's) house is and how my dad is friends with a lot of wealthy people and that "we would all cut her out if we found out what she really wanted" which I thought was weird because it was really the first time we had met <br><br> 4. One time she asked me how much my dad spends on me and my sisters and why she doesn't get "the same care" as us. I was really confused because my dad dropping 13 grand on her car isn't the same as him dropping 13 grand on his son? I guess I just don't understand that logic. I told my dad about it and said that she's not used to be in a relationship with someone as wealthy as him and that she is just trying to get used to his "ifestyle" (which he called his "lifestyle" when we were discussing it)<br><br> 5. She's always buying my dad gift cards to add to his collection and telling him about these expensive restaurants and experiences she had with her ex (she said they were gifts but I have a feeling that my dad paid for them and that's why she's bringing it up). She told him about this really expensive bottle of wine she drank on her birthday and then he brought that exact bottle home. She really emphasized that it was 1.5k a bottle and my dad told me "well she likes it". She's always talking about designer brands, expensive houses and cars and anything that has to do with wealth. <br><br> 6. My dad is supposed to go on a business trip but instead he's going with her to Miami for her birthday. She claimed she needed a friend to go with her because her birthday was going to be "emotional" but I have a feeling that my dad paying her was a big factor in her getting him to skip his business trip (he hasn't missed a trip in years its not like he has the option to skip)<br><br> 7. I don't want to repeat everything she's said but it really does sound like her plan from the beginning was to get my dad to spoil her. I told him about my concern and he got mad at me and told me that I had no right to question who he dates. He said that the things I've mentioned aren't all of her like I'm just cherry picking to make here look worse. I understand that I am biased but I don't want to see him hurt because of some gold-digging scammer like her<br><br>If you made it this far thank you. I just really don't know what to do, I feel bad because she's my dads girlfriend but I also don't want to see him get hurt by her. Should I talk to my sisters/aunt/uncle about it? I feel like I should've dealt with this way earlier and now that her birthday is here I don't know what to do. (She wanted a 14k pair of earrings for her birthday from my dad but he got her something else)<br><br>**TL;DR:** My dad is rich and I think his girlfriend is a gold digger? What can I do about it?<br><br>Edit: Do NOT contact her on social media. I've already had to deal with 50+ people messaging me on different platforms. I also gave her the bare minimum for identifying her so please stop trying to contact her.