How to react to fake crying etc?

My younger step sister thats 14 is going to come today and I really don't look forward to it. Last time she was here visiting, all she would was play a bragging game and talk about who makes more money and who has the best phone. She's 14 and she works a low income job with my mother and recently told me she bought an iPhone8, while I'm working a weekend job where I isually get $150 and I mow and make noney during the week. Now i'm paying off a car loan to my parents. When she visits I know she will want to get her hands on my car and ask my parents if she can step inside which I do NOT want to happen. I don't know how to stop that IF it does happen. When I get pissed she fake cries to manipulate and make everybody feel bad for her. I don't know what to do and what is best for my game in this situation but it is bothering me and I need a better way to do this.

IPhone 7 shutting down?

While switching between apps, my phone's screen suddenly turned black with the spinning circle you see when the battery dies. It's been doing this for 15 minutes, and it won't stop when I hold the power and home button at the same time. The phone is fairly new (bought four months ago) and hasn't been damaged at all. Help is appreciated.

Added (1). (It's completely unresponsive.)

Are the iPhones 8 and 7 the same?

I'm actually pretty confused now… I'm getting a new iPhone and looking at the iPhone 7 & 8 they LOOK IDENTICAL! I also though that the iPhone 8 & 10/X were the same thing… SO CONFUSED, IF ANYBODY COULD EXPLAIN, THAT WOULD BE GREAT (differences).

Added (1). & why wasn't there an iPhone 9, the hell is going on?

Can this person find me through Omegle?

A couple days ago I decided to have a go on Omegle. This was the first time I was ever on the website. I got into a chat and the stranger said to me "M". I assumed he or she was asking if I was a male so I replied with "Yeah". Then, he/she said "What did you just call me." The next message was "I'll kill you for that." Frantically, I disconnected immediately and cleared all my browsing info and even turned off location services since I was using an iPhone. I just want to know if this person is actually capable of finding me. So the question still remains, can this stranger find me through Omegle?