Many paranormal romances include the idea of a mating bond: That there is ONE individual out there destined for the vampire/shapeshifter/demon/whomever. So that when the (usually) male half of the couple smells the female half, he knows she is The One.
That particular trope can be hard to swallow (or sniff?). In real life, it's not as easy as smelling your partner and just knowing.
So how long did it really take for you to figure out your partner was The One?