It don't have necessarily to be a sister, can be a friend or something similar right?
Besides since is about wolfs we are talking about we could each one of us have our own harem. No need for fighting mate.
So you have a cute wolf girl mounting you talking about silencing you for good...What's your first reaction?
...Ask to pet her ears and tail? Yes, I very much agree with our protagonist's methods.
Great ending too. I do agree that it doesn't sound like much of a choice (Since both are kind of nice considering you get to be with her either way), but of course becoming her lifelong mating partner essentially means marriage, yes? And I do so love marriage endings...
dah dah
FOR YOU RIGHT
.. DAHDAH
TO MAAAAAAAAATE
Besides since is about wolfs we are talking about we could each one of us have our own harem. No need for fighting mate.