Jill Dillard and Jessa Duggar, soon-to-be Jessa Seewald, were spotted at the Demolition Derby, together with their respective significant others. But that's not all -- what seems to be a double date is actually a family date for the entire Duggar Family.  The official Duggar Family blog shows photos of their trip.

The entry said, "The Duggar family spent Saturday night at the Springdale Demolition Derby, followed by a trip to Braum's, Michelle Duggar's favorite ice cream parlor."

The post also said that going to the Demolition Derby is a family tradition.

Jill is due to give her first child with husband Derick Dillard in March and the couple has been very much in love since their wedding. Her sister Jessa has announced her wedding plans via the TLC website, and viewers will soon get to see her marry Ben Seewald.

Fans should know that Jessa actually met Ben earlier than Jill met Derick. They've been courting longer so it's about time that the two walk down the aisle and take the vow.

With the Duggar tradition of short engagements, the wedding will take place on Nov. 1. The proposal, wedding planning, and wedding might also be featured in the next season together with Jill's pregnancy.