<P> Meredith finds out she has a maternal half sister named Maggie Pierce who is now working in Grey Sloan Memorial . Meredith is in denial and rejects Maggie , thinking she would have remembered if her mother was pregnant until she finds a hospital document confirming the revelation . Meredith tries to piece together her relationship with her mother and half sister by going through old videos of her mother . She eventually recovers her repressed memories of the pregnancy when she views her mother 's diary and has a change of heart , choosing to accept Maggie and begin building a relationship . </P>
<P> Meredith finds out she has a maternal half sister named Maggie Pierce who is now working in Grey Sloan Memorial . Meredith is in denial and rejects Maggie , thinking she would have remembered if her mother was pregnant until she finds a hospital document confirming the revelation . Meredith tries to piece together her relationship with her mother and half sister by going through old videos of her mother . She eventually recovers her repressed memories of the pregnancy when she views her mother 's diary and has a change of heart , choosing to accept Maggie and begin building a relationship . </P>
how are dr grey and dr pierce related
how are dr grey and dr pierce related
maternal half sister
maternal half sister