Matthew didn't just talk for the sake of talking; his manner of speaking touched on key points in the life of the man in front of him. They were points important enough to get to his weakest part.
His age, the weather, the strength of his enemies, and even his own stagnation. They were all points that attacked what in the nights told him that, perhaps, the opportunity for revenge would never come.
A vampire has a limited lifespan, after all. Though they live ten or more times as long as humans, they will eventually die, and though it takes a long time to come, it certainly will.
Although Jack Allen was surprised by this guy's identity, he didn't give it much thought until he realized what Matthew was doing. Thus, it only remained to see the guy's reaction to the two of them.
He stared at them for several minutes without uttering a sound. His silence revealed his deep thoughts, considerations, and machinations.