'Sister Wives' Janelle Brown Shares Last Family Photo Before Son's Death

Janelle Brown is remembering happier times in the wake of her son, Garrison Brown's death -- posting a photo of the last time her whole brood was together. Just a couple days after reflecting on Garrison's passing -- which occurred earlier this week -- the "Sister Wives" star shared a sweet family memory ... throwing up a pic on her social media that featured all six of her kids, whom she shares with her ex, Kody…