Hehe, can totally relate. Though my parents don't care about cake or sweets, they just say, whatever if you don't want it, no problem. Though they keep on asking indeed, like, You really don't want something? And that's polite. though the part of being quiet, daaaamn yeah, my mom keeps asking me like ''Why are you so quiet'' and then she makes this sound ''Ugh'' afterwards because she wants me to talk.
I'm more talk active than my dad though, I talk way more than him, He always needs to ''think'' when my mom and my dad are having a conversation, especially when they are having a conflict, then my mom can get extremely pissed at him for not talking, he then says, ''Yeah, uhuh'' and then she says ''HELLO?, anyone out there?'' I don't know, it reminds me of my dad.
My girlfriend sometimes asks me on the phone, why are you so quiet? I explained to her, though i might not have explained it more carefully, I sometimes have these brain fog moments, I once was in a crowded bus, like PACKED OF PEOPLE, and they all looked at me, and then I can't express myself easily when they ''DON'T MIND THEIR OWN BUSINESSES'' by staring at me, so I get lost in the conversation. Though when it's just a bus with less people I can communicate easily when she's calling me like yesterday.
I really want to call her when It's packed again, and find out how I can just keep rambling without focussing on those people, it distracts my mental state of what I'm thinking about XD.
And mostly, it's even more weird, since nobody talks when it's so full, everybody is staring, and NOBODY wants to be in the center then, even not socially anxious people, they all want to be quiet then. So when I call, everybody will focus on me, ARGH, mind your own businesses. -__-