Imprinting Is Described as "Love at First sight but Stronger". Once a werewolf imprints they find it hard to spend much time away from that person. They will also commit to spending their lives protecting this person. licantropi can imprint on a person no matter what the age (Even a baby. But the relationship is soley a "Freidship" until both are around the same age.
Imprinting means a werewolf is like madly in Amore with a person o vampire in this case. But in Jacobs case he treats her like a little sister, and he is the BEST big brother ever. Then they will data and get married and stuff like that.