Jacob Roloff's Fiance Isabel Poses With Audrey Roloff, Calls Her 'Sister'

Jacob and Garretson traveled together to Iceland, where he popped the question, and flaunted that they were staying together in the same guest room.

Audrey wrote, "Some words on dating from a Christian perspective… Let’s just say you recently hurried into a relationship, dabbled with sexual intimacy, and then became emotionally attached. The main problem with this scenario is that it blinds you to red flags. It’s the classic ‘love at first sight’ trap. You begin to see the person you are dating as the ‘the most talented, most interesting, and most extraordinary person in the universe.'”

But incredibly, despite Audrey's digs, it's all love, hugs, and smiles as far as Jacob's fiancé is concerned!

Jacob announced his engagement to Garretson Iceland in January after keeping the news secret for more than a month.

In her Saturday Instagram post, Garretson wrote as a caption to a picture of herself with her head on Tori's shoulder, with Audrey sitting next to Tori at the back of a truck, "I'm so lucky that I gain three sisters by coming into this family. To receive encouragement from, endless support and to always have them to lean on ?Love you ladies, just missing you Molly," she added, in a reference to Matt and Amy's only daughter, who wasn't there to be photographed.

Jeremy's Christian marriage blogger wife Audrey and his free-spirited, intellectual brother Jacob have little in common. And while Jacob mended fences with his parents Matt and Amy and siblings after a brief estrangement, he showed he never warmed up to Audrey by shunning her on Instagram.

Jacob also clashed with his clan over religious beliefs. While Amy, Matt and especially Jeremy and Audrey are strict Christians, the rebel brother considers himself to be agnostic.