You're hers.

"W-wait... What did you just do?" You try to ask while still coming down off the high from cumming so hard. As you reach for your neck, you feel a sudden tingle race across your body as your hand makes contact with the spot she marked.

"I'm sorry, I know I should have explained everything but I couldn't hold back anymore...." She said while avoiding eye contact with you. You can't help but notice how cute she is when she's embarrassed.

After asking her a couple more times you finally got her to explain. Apparently the wolfkin in this world tend to have predetermined 'mates', essentially soulmates. Some unfortunately don't ever find their mate in life but those that do are automatically drawn to their other half, leading to an almost instant love of them once they meet.

According to her, when a wolfkin first meets their mate their instincts all but completely take over as they are overcome by intense lust and the need to mate and 'mark' their mate to essentially claim them as theirs. Which means her marking you, (biting your neck deep enough to leave a scar), is pretty much the same as her branding you as hers. Which strangely turns you on thinking of it.