Well, this is what actually happened.
When we arrived we were welcomed warmly by Dymphne's boyfriend, Jan.
Jan explained us a bit about Ghent's entertainments and most valuable architecture, restaurants and pubs.
We were very well surprised and thanked Jan sincerely.
After a while, when we decided to put our pijamas in the bed, the situation of the sheet made us not very "pleased".
The sheet smelled like they had been used, and what the smell could have been misunderstood, so it wasn't the sight: yellow and brown spots, nails and pubic hair.
We contacted immediately Dymphne and Jan: the first one said she made her mother wash the sheets, and that anyway she couldn't change them the same night, but only the day after.
Jan replied something like "what did you expect for 70 € per night, a hotel is double of the price.
We slept with our towels put on the bed. They gave us no choice.
The day after, we received 40 € for the "inconvenience" and clean sheets.
Make your choice.