Thompson and his party had been protecting Familia Hotel—Basil's family for six days. In other words, this was the last day they would stay in Raneil Barony.
The deal he had made with Basil only obligated his party to protect his family for six days, and whatever would happen to his family after six days wouldn't be their responsibility.
Judging by the current situation however, Thompson was sure that something would definitely happen the moment he and his party left Raneil Barony—he was anxious because of this.
Up till now, six Shadows had lost their lives. The clash was getting more intense in each passing day, and it doesn't show any sign of stopping anytime soon.
Thompson would even consider themselves lucky to be able to hold on this long, because the Middle Class Demons that grew up behind the Obelisk's Barrier they were fighting really had an exceptional power.