Isa is Kay's big sister. Wherever Isa is Kay is right behind. Isa and Kay shared a room always until college. Isa and Kay are identical but very different. Isa is short; Kay is just a bit taller. Isa cries when she laughs; Kay just cries. Isa gets crazy sometimes; Kay is always crazy. Whatever Kay wants Isa makes happen. Some might also say Isa is a big reason Mark and Kay met.

Esmer and Kay are best friends. There is nothing you do that can break their bond. They believe that if they died they would come back for each other. They also believe that all their happiness is because of each other....just don't tell mark. Esmer and Kay have matching tattoos.

Aliyah and Kay are best friends. Even their dogs are best friends. They were also college roommates. Aliyah is the reason she has Toby. Aliyah and Kay wish they could live together like the old days.....maybe one day.

Hannah and Kay are best friends. Hannah reminds Kay of a girl version of Mark. Hannah is very smart & introverted unless she likes you. Hannah will never say no to brunch. Kay loves Hannah for all reasons.

Vivian and Kay are best friends. Vivian is married to Jay. Jay is Marks best friend. Mark brought vivian in Kay's life. Both Kay and Viv love that they will forever do everything together like party, get engaged, get married, maybe have kids, and hopefully own a compound. Viv and Kay's dream is to have kids that will be best friends.

Lizzy is Kay's non blood related cousin. Lizzy's dad and Kay's dad are besties; just like them. Since Lizzy has come into Kay's life, Kay has always referred to Lizzy as her cousin. It is easier than explaining to anyone that Kay has known Lizzy since elementary and spends holidays and every weekend together.