Descent of the Two Pets
It took Nile almost 5 hours to reach the village entrance, but after hearing the alarm, it only took him a few minutes to came back to the house.
Nile circled the entire house in an instant to search for the intruder. He couldn't find any, so he entered the house in alert. As he was already here, the alarm had already stopped ringing.
Nile collected the alarm and sold it again for half the original price.
The same moment Nile entered the house, two doors also opened at the same time. No, not opened, instead, it was, two doors were broken at the same time.
Nile stared at the two broken doors leading to his two pets. The instant the two doors broke at the same time, Nile already knows what was going on. There is no intruder or something like that.
The movement reported by the alarm system was just his two pets finally succeeding on their evolution.