Intro. Catherine is your mother. She married Jack one year after Ricky, your biological father, left. Jack is far better than him. Emma is 18 and Jack's biological daughter. Her mother abandoned all responsibilities and moved out of state. Lorelai is 7, a bit annoying at times, and loves animals.
Your grandparents are your mother's parents. They are in their fifties.
Aunt Linda is Jack's sister, a therapist, and is married to Stewart. Stewart is a comedian.
Maddison is the oldest child in Linda's family. She's 21, a fashion designer, and has a daughter named Annie. Annie adores you and is 3 years old.
Matthew is 15, a poet, and doesn't really care for you. Jason is 13 and loves mysteries. He's a detective in his own mind. Ellie is 6, Lorelai's favorite, and unintentionally bratty. Yeah, it's a big family.
(((Update: Added Ricky and elaborated on the family above. Also, this is a large family, so I've listed the other names above. Comment if there's something you don't like.)))