I don't own commander in chief

I got this idea when watching a Nathan, Mac slide show to the song Father Figure

Mackenzie had just finished for the day in the Oval office, she had just been given terrible news that the speaker of the house had Leukaemia and would need a bone marrow transplant, but he never had any kids or brothers and sisters of his own, his family were all in-laws, even though she never got on with the speaker he was still a friend to her and she felt incredibly sorry for him and his wife. Mac left the office and walked to the residence, Rod was in New York with Horace and the girls were both at friends for the night so it was just Mac and Kate for dinner.

Mac told her mother all about Nathan and the Kate's face fell

Mac: Mom what is wrong

Kate: Honey maybe you should see if your bone marrow matches Nathan's

Mac: Why would it

Kate: Well you are aware that Nathan was a friend of your fathers

Mac: Yes

Kate: Honey this is not easy to say, but your father and I were not getting on too great and before Nathan married Sarah he and I had an affair

Mac: You had and affair with Nathan Tempelton, oh I get it now, all the looks between the 2 of you, the flirting

Kate: I am not going to hide it Mackenzie I had feelings for him

Mac: What about Dad, wait a minute are you telling my that Nathan could be my father

Kate: Yes

Mac: HOW COULD YOU DO THAT, DAD LOVED YOU AND YOU CHEATED ON HIM, AND WHAT ABOUT BILL, DID YOU WAIT TILL DAD DIED THEN

Kate: That is enough, just because you are the president does not give you the right to shout at me I am your mother

Mac: So who is my father, do you know

Kate: I am certain it is Nathan,

Mac: And you never thought to tell me all these years

Kate: He married Sarah and became happy I was not going to ruin that

Mac: I am going to bed I don't even want to talk to you

Mac left the dining room and went to her bed, she could not believe what she had just found out

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