"This papa is the best at getting bubbles outta gassy tummies … and this little fella is adorbs!" Jill wrote, captioning a pic of son Samuel on Derick's back.
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THE FAB FOUR
Just a week shy of Samuel turning 1 month old, Jill shared a sweet new family photo of her baby sitting beside his older brother — Israel, 2 — on their parents' laps. "#littlehappyfamilyof4 #soblessed #boymom," Jill captioned the sweet image, shared to Instagram.