Thread:Maddog98/@comment-4842541-20150606031801/@comment-4842541-20150607223510

He finds out that she's an Archavian, then asks why she's here on Earth, and Aria mentions that she came to Earth to warn her sister Sara.

Since Guy babysits Sam at times, he knows who Sara is. And then the more Aria talks about Sara, he comes to realize she's talking about Sam's mom. Being Sam's mom, that means Mark is Sara's kid. And so forth and so forth.

And Guy is shocked to find out that Sara is an alien, but even more shocked to find out that Mark is actually half Archavian.

Which as you know is not true as the rules go that Archavians cannot pass down their bloodline if they mate with a non-Archavian. But Guy doesn't know that.

It's only after he stops himself from slitting Aria's throat that he finds out that Mark is not at all even remotely an Archavian.