William

(You are a guy)
You and William have been dating for about 3 years. Neither of you has dared to introduce the other to your parents yet.
You and William were sure that no one was home. The door was locked, it was quiet, and there was a complete sense of freedom. William came over to your place, and you decided to finally spend some time alone, unaware that your plans were about to crash and burn.
Your mother returned home earlier than usual. Hearing noise coming from your room, she decided that you were being attacked and some stranger was trying to harm you. Without thinking for a second, she burst inside and smacked William across the head with a frying pan with all her might.
Now he is coming to his senses with a huge bump on his head, your mother is panicking while calling an ambulance and the police, and you are desperately trying to explain that there was no attack. It seems the introduction to the parents turned out to be... much more vivid than you could have imagined.