Dale Benfield/ Benfield Photography
September 09, 2015 12:30 PM

Amy (Duggar) King sure knows how to party!

Following her romantic country ceremony, the fun-loving Duggar cousin slipped into a slinky satin rose-gold-hued gown and hosted one rager of a reception. And that, she says, was her conservative cousins’ cue to exit.

“They left right when the music was starting,” Amy tells PEOPLE of ultra-religious former 19 Kids and Counting stars Jim Bob, Michelle and their brood, including daughters Jill and Jessa. “They stayed for two songs or so. It was country so they probably dealt with it.”

RELATED VIDEO: Did Amy Duggar Show Too Much PDA?

But after they slipped out, “The lights went down, the disco lights came up. Everybody kicked off their shoes,” says Amy. “It went from classy to trashy real quick, which was the best!”

As the party got going, “Everyone was having the time of their lives,” she continues. “We broke out the bar as soon as my family left. The champagne was chilled, we had whiskey, mixed drinks, everything. It was so fun.”

Her cousins weren’t the only ones to cut out early.

“I left at about 10 o’clock,” says the mother of the bride and Jim Bob’s sister Deanna Duggar-Jordan. “When the rap music started, I decided it was about time to go. But they were all having a good time.”

As for her brother and his family leaving, Deanna says, “I totally understand that.”

The party went on into the wee hours of the morning.

“It was just a really good celebration,” says Amy, who at the end of the night left on back of Dillon’s Ducati motorcycle. While she jokes that her guests “were probably hurting the morning after,” she and Dillon were on cloud nine.

Says Amy, “He was staring at his ring all morning. We’re just so in love.”

For more on Amy Duggar’s wedding, pick up this week’s issue of PEOPLE, on newsstands Friday

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