Mark and Addison's relationship has always been my 秒 最喜爱的 relationship behind Derek and Meredith. Addison was miserable and unhappy because she knew Derek loved Meredith. "He's just... the only people who don't know that Derek loves Meredith are Derek and Meredith." Mark admitted to Addison that he knew that Derek was in 爱情 with Meredith ano not her. "He’s not in 爱情 with you. He’s in 爱情 with that intern. He’s not even trying to hide it. Why would 你 want to stick around for that?" After Derek met Meredith and she decided to 日期 both him and Finn, he saw Mark coming out of the bathroom of Addison's hotel room with a towel. Mark is the only man who truly understands Addison and what she wants. All the other men that Addison has been with will never understand her the way that Mark does. Mark is the only one who will ever truly Addison and Addison is the only one who will ever truly 爱情 Mark. Mark and Addison 爱情 each other and they will always 爱情 each other just like any other couple in love. Addison will never truly understand what it means to be in 爱情 if she's not with Mark. Even though Addison broke the sixty 日 bet she had with Mark, she was still head over heels in 爱情 with him. Addison knew that Derek would never truly get over Meredith. Addison's arrival was the catalysit that would cause drama between them for a while until Derek realized he was hurting Addison. She belongs with Mark because he would never betray her the way Derek betrayed her. They are madly in 爱情 just like Derek and Meredith.