Answer: I would tell Jacob from "The Twilight Saga" that he was going to imprint on Bella's daughter and that Bella would be fine as a Vampire. I would tell him this so he didn't have to make a friendship so awkward, hate his friend's partner, and spend a couple years in jealousy and sadness. If he knew that the reason he was so interested in Bella was because he was going to imprint on her daughter then his life would have been a lot easier. He messed up his friendship with Bella by thinking he was so in love with her. He spent so long hating and being jealous of Edward because he wanted Bella. He also would have been more accepting of their relationship if he knew she would end up fine, happy, and having a happy family. Overall it would have made his life a lot easier and happier.