[What time-frame is this RP Set in. I asked brokenfang earlier and he said modern, but we are heading to a fur trading town?]
"It not anywhere as different or as horrifying as you are imagining it" she said with a laugh, dispelling and dismissing the fear of the younger girl. "You see, the pack I am from, it is transmitted through blood, and blood alone." she continued to talk, trying to explain it in layman terms to the younger girl. "As you probably know through the readings of your kind, in the womb, the blood of mother and child do not mix. There are exchanges of nutrients and oxygen through the capillary beds of the placenta, but they never do mix."
She kicked at the stone that had come to a stop that Max had sent up the path earlier. "So in a sense, despite having two parents of our kind, most of the pack is human until birth" she let out a smile. "So at one point or another, you and I were no different".
"It's when we are born, when the placenta is torn that we are given our gift, and it's from that moment on we join the ranks of our packs. The curse doesn't take effect until a couple of years later, around the age of puberty, which is when we learn to control our powers" she said with a nod.
"I am sure Max's pack was much the same"