Translation of trenchant in German

We would love to have you here as our guests! My niece Katja had also many diffculties with the new surroundings. She is really upset with this new change. How was your trip to Italy? I'll keep writing to you!
First of all they gave me some chicken, which the mother has cooked especially for me. Well, the bizarre thing was that they did not join me while I was eating because I had a different meal.
We booked a tour for the next two days, one on a boat and the other on foot. In one of the agencies we met a nice couple and decided to stay in touch with them and have dinner together.