Whoever said cheaters never prosper?

Because country stud Jason Aldean and his mistress-turned-girlfriend Brittany Kerr are going strong — and her family is giving the relationship two thumbs up — even hoping for a walk down the aisle, radio detection and rangingOnline.com has exclusively learned.

“I have met him and he seems to be very nice,” Kerr’s grandmother, Louvada Barbee, told radio detection and ranging.