Yawning, Donna wandered into her ensuite.
Thanks to all the running that they had done that day chasing Ood, she was exhausted. She couldn't hardly keep her eyes open. She wasn't even sure that she had the energy to turn on the taps to have a shower.
She gave the TARDIS a thanks by patting the wall when she heard the shower already running.
'Thanks old girl' she murmured, and the TARDIS hummed.
Donna was so tired, she didn't recognise it was a different hum to usual.
She stripped off and stepped into the warm shower. And right into something tall and slippery with soap.
'AHHHH!' she screamed , in horror what she just saw.
A naked Doctor, USING her shower. He tried to cover himself, but could only find a facecloth. His eyes were widened in shock, Donna couldn't bare to look at him.
'What! WHAT! WHAT!' he yelped. 'I don't understand, Donna… what?!'
Donna wanted to get the nearest bar of soap and wash her eyes out.
She couldn't unsee that! She quickly closed her eyes, the image still etched against her eyelids. She grabbed a towel and wrapped it around herself, for dignity. She heard the water turn off and the Doctor step out, mumbling. She was ready to give him a serve, how dare he use her shower, when he had his own!
'OI DOCTOR WHAT THE HELL ARE YOU DOING IN MY SHOWER! I HOPE YOU DIDN'T HAVE A PERV YOU DIRTY OLD ALIEN! ' she yelled.
'Donna, let me explain.. ' she heard him start.
'I DON'T CARE..!'
'Donna , open your eyes..' he urged.
'NO!'
'Its okay Donna, I have a towel around me now.. open your eyes and have a look ..'
Donna cautiously opened her eyes , the Doctor was leaning against the vanity, gazing at her.
Then Donna groaned.
'I must be more tired than usual' she muttered.
She had wandered into the Doctors ensuite.
This time, she heard the TARDIS hum , a definite chuckle at her trick.