If You Love someone, would you choose to be with them? even if it meant letting go something you've been holding on for so long? For Addison Montgomery, She would choose to follow her hearts desire and choose to be happy.
When Addison went back to seattle to get her husband back or that's what she taught, she stumbles upon a woman who happens to be the woman who's been screwing her husband.
Meredith Grey, also known as "Ellis Grey's Daughter" The woman who became derek shepherd's new love interest when he came to seattle to get over his wife who she cheated on him with his bestfriend.
When the two have met, they weren't expecting more than to be enemies, but like any other story, theirs was more unexpected. Especially when Addison, Against all odds , finds herself falling for her husband's mistress.