The NFL icon has been living it up with his better half, American singer Jessie James Decker and her husband, football star Eric Decker. And by the looks of their photos and videos, they're all having a hell of a time.
Gronkowski, who was spotted getting all handsy with Kostek at this year's Super Bowl parade, was in a similarly friendly mood when the model started twerking on a boat. Jessie captured the spontaneous move and put it on her Instagram story for the world to see.
Kostek has been active on the socials too, keeping everyone updated on how the pack's holiday was travelling. After posting a photo of herself in a lime green (or fluoro yellow, we can't decide) bikini, she felt bad and asked her beau to join in the fun.
"Was being selfish in my last post. Here we go," she captioned her second snap.
It also appears Gronkowski has been playing a starring role as a "boyfriend of Instagram", whipping out the camera whenever duty calls.
"Me and the sea, photo by @gronk (he's now hired as my new content creator)," Kostek wrote on another picture of her enjoying the scenery before Gronkowski was again allowed to enter the frame after she'd already stolen the show.
But then it was away with Gronk and Kostek decided to show off how much more fun she's having than the rest of us.
Apart from filming Kostek's twerking, the Deckers have also been enjoying some quality time together. Wide receiver Eric called time on his NFL career last year after signing with the Pats midway through 2018 following stints with Denver, the New York Jets and Tennessee Titans.
But football looked to be the furthest thing from his mind as he and his wife made everyone on the internet jealous of their glamorous lifestyle the rest of us can only dream of.
