How do I react to this?

Yesterday I was at my cousin’s house and we were cooking and at some point, her mom looks at me and says: ” Oh my god, you have this huge thing(pimple) on your face” then I stay quiet, then she says ” Do you see it, oh my god it’s so big it’s right there, why is it there?” then I stay quiet, I say I don’t know and she kept talking about it in her shocking expression.

Her daughter told her to stop then she said : ” Well it’s right there, yall can be lying to yourself but I wont be lying to myself it’s there.” So i just sat at the table then I couldn’t and went in the bathroom to cry a bit and came back.

How do you answer that question ? How do you react ? I felt the rush of anxiety rushing threw me. I don’t know why it’s there, it came by it self I didn’t invite it. It’s like being ugly. I didn’t choose to be I just am…