A story I can think of is that a boyfriend's dad was a bit of an adventurer. He had traveled all over the world before settling down. He would often tell exciting tales of his travels to the couple. His stories inspired them to plan their own adventures together, and also helped the girlfriend understand more about the family's spirit of exploration and love for new experiences.
Well, I once heard a story where a boyfriend's dad was a really talented cook. Whenever the couple visited, he would prepare these elaborate feasts. He would share family recipes with the girlfriend and it really made her feel welcome in the family. It was a really nice way of bonding between her and the boyfriend's family.