The Doctor and Donna were continuously mistaken for being a married couple. Everywhere they went. They couldn't get why , and they would never be married to one another. Never, ever. They just drove each other insane, they were best friends. Nothing more.
Until one day, they were standing at an altar, they couldn't leave this planet unless they wed. Donna was breaking up laughing while they exchanged vows and swapped rings, the Doctor laughing as well at the situation. The priest told them to kiss, and Donna spoke up.
' I'm not kissing that long piece of alien for anything!'
' I'm not kissing her as well !'
The orange skinned alien glared at them. The Doctor leaned in for a kiss, Donna slapping him on the cheek when he did .
' That's as close as you're going to get, sorry' The Doctor told the priest.
' I may pronounce you Doctor and Mrs… ' He looked at the Doctor , confused, this man didn't give him his name, just called himself the Doctor.
' Smith.'
' Doctor and Mrs Smith. You're free to leave' and they did , still laughing. It wasn't until they got back to the TARDIS, when the Doctor spoke up.
' Soooo Mrs Smith, nice to be married to you, but I guess.. we will need a divorce'
' Not until I have some fun first' The Doctor stared at her. Then Donna told him what she had planned.
Silvia Noble opened the door and Donna wagged her finger at her, the plain band glistening in the sunlight.
' Mum, guess what , I got married!'
' To who then?' The Doctor held up his hand, the band on his ring finger.
Silvia Noble just fell to the ground, shocked, not before saying..
' You married him ! That alien!'