Sister Wives star Janelle Brown opened up about the grief she has felt in the wake of Robert Garrison Brown’s tragic death, revealing the sadness comes in waves. “It’s been hard to get my brain to work properly again,” wrote the heartbroken mom of six, whose late son Garrison was shared with ex Kody Brown. They separated in Dec. 2022. “I am so grateful for the outpouring of love and support I’ve received these last three weeks.” Janelle said that she was “honored” to have received an influx of sentimental messages. “So many of you wrote of your thoughts and prayers. Thank you from the bottom o…