But are the two actually related in any way?
Although Erin and Mallorie don’t share any blood, the former college roommates are technically related by marriage.
It’s clear Erin and Mallorie are grateful to have found each other and built a lasting bond.

How does Mallorie Rasberry’s life compare to Erin Napier’s?
On the surface, Mallorie seems to have more practical tastes than Erin.
However, upon closer examination, it seems Mallorie and her husband share some of Erin’s fancier tastes.

It seems the friends and cousins-in-law have a lot in common.