B: (to friends at large) Why don't you come over for lunch on Sunday? My cousin (that's me) will cook something.
F-a-L: Sure. We'll be there.
B: (to other friends at large) Why don't you come over for lunch on Saturday? My cousin (me again) will cook.
F-a-L: Sounds good.
B: (to her friends-at-large - people I barely know) Have dinner with us on Saturday night. My cousin (by now you know who this is) will cook.
There's a pattern emerging here, I just know it.