The 30-year-old reality star's cousin, Jinger Duggar, tied the knot with Jeremy Vuolo in November, surrounded by their closest friends and family.
Amy and her husband, Dylan, had previous plans.
"...It was just wrong timing. My husband and I already had something scheduled."
Those previously scheduled plans were a trip to the Vegas stip to attend the 2017 SEMA show, a convention for specialty car and auto parts.
"It was dream of Dylan's to be part of it, and his truck was being sponsored."