Disclaimer: I own nothing, except my own creations.
Opening the door, she winced as the exclamation reached her ears. 'Wow Penny. You're as big as a house!'
Depression set in before a voice piped up from behind. 'Wolowitz, I object to your statement,' declared Sheldon.
She felt better instantly.
'There is no basis in fact,' the genius continued. 'It is not appropriate to call a pregnant woman as big as a house when it is obvious that she is not as big as a house. It would be more appropriate to call her as big as a baby whale or as big as...'
Now she was depressed again.
Finito.