On Addison's first time coming back to Seattle after leaving for L.A. she hugs Meredith and remembers why she left Seattle in the first place. While there she finds out that Meredith and Derek are not together anymore. She wants to find out if her feelings would be reciprocated. Meddison with some McDreamy/McSteamy things. (Some dialogue from GA 4x13). This is a part of the fic exchange a few meddison writers worked on over in Ao3. I'll leave the link in the comments for you guys if you want to find the others.