Fucked up morning

Typing this as I am sitting in my office, supposed to be working but really had no mood. Fucked up morning, it really is.
First of all, I need to explain that I am carpooling with one of my colleague who stays near me, and who coincidentally is my cousin's cousin. Not close with him at all, no common topic of interest except about work. He's a rich ass kid who drives a C-class to work. And yeah, it means I sit in a C-class to work, not everyday though.
So this morning he told me he had something to do and that he'll be late so I waited at my house. When he finally came and I got up his car, there was a lady behind. I don't know who she was, and my colleague didn't introduce anything. I thought is his girlfriend but she seemed too old, a bit young if she's his aunt. I wasn't sure what to say that time, saying hello would be rude if she's an elderly, calling auntie would be wrong if she's not. So I didn't say anything, and before I could think of what to say, they started chatting in Teochew and after a while I figured out she's his aunt. And since they were speaking in Teochew and they were talking about personal/family stuff, I remained quiet the whole journey.
When we reached Penang the aunt request that we go for breakfast before we head off to work. So we sat down at this kopitiam and she started telling me off: 'Are you his friend? Why are you so quiet and so rude? I was wondering why my nephew have such a friend...You were so quiet the whole journey and you didn't even say hello!!'
Caught completely off guard, I took it all in and smiled while saying sorry. But deep down inside me I was yelling what the fuck really. I admit that I do have fault because I didn't greet her, and I'm sure she has the right to tell me off as she's paying my breakfast, though I don't feel like having that free breakfast at all, after what she said to me.
From my point of view, I mean, come on, my fucking colleague didn't even introduce or say anything. And you guys were speaking away in Teochew so what am I supposed to say? My Hokkien already suck so bad and you guys were speaking Teochew, I don't even understand a quarter of what you said. I tried to explain to her that I didn't know who she is when I got up the car hence I don't know how to appropriately address her, but she said you could have said hello and I had nothing to say.
After she learnt that I am studying medicine, she's like: Are you kidding me? How can you be a doctor when you are so quiet? I kept smiling, but inside I thought that was such an insult and it was really way over the line.
Come on, I'm not even close with my colleague, and you don't even know me, so who are you to judge me like that? Sometimes I really hate to have to deal with these aged group, not the old people but the supposedly 'matured' bunch, because I hate the thing that you have to address everyone appropriately, and I hate that they like to poke into your life, a bit too much, and whatever you told them today will be the headlines for everyone tomorrow. And personally for me, I hate the so called manners where you have to greet everyone, I thought it a waste of time and has no significance at all. Call me odd all you want, because I am. And thus you can tell that my relatives don't really like me, as I don't really like them either.
End of story.