It Might've Been Awkward Asking

The next day, we discussed how Nephi and his brothers were commanded to go to Jerusalem... Again. They went and retrieved Ishmael, who I presume was one of Lehi's contemporaries, and his family and brought them into the wilderness. Interestingly, Ishmael just ups and goes when they arrive. 

"Wanna leave Jerusalem and live in the desert?"

"Yeah, why not. Lemme grab the family."

It was important that Ishmael and his family came, because this gave Lehi's and Ishmael's children (and Zoram) the opportunity to marry and have families. Families are integral to Heavenly Father's plans for our happiness in the next life, which is why we are sealed together forever in the temple. No "til death do us part" for us.