Skylanders, the whole franchise is an amazing couples game, you can invest a tiny amount of money now on skylanders Giants on any platform and pick up a host of figures, before long you guys will find yourselves with your teams of His/hers figures and be fighting through all the games.
Really, nothing beats it in terms of co op fun game.
Wait... just read that it's ps4/switch, in that case you can't get Skylanders Giants but you can get Swap force which is amazing and supports all the figures from the first 3 installments, if you've any questions regarding the games just ask, I love the stuff :)
Swap force is also cheap cheap cheap to buy now.
https://ie.webuy.com/product.php?sku=5030917132681
Why not check me out on youtube and help me on the way to 2k subs over at www.youtube.com/stormcloudlive