Merely lounging together, kissing & caressing each other gets them hard and Küper starts stroking Sean gently. It's Sean who ignites the fire by taking out Küper's thick cock, going down on him and savoring every inch.
He pounds Sean fast, deep and raw, driving his cock in and out so perfectly that he makes Sean cum hands free! Sean doesn't want him to stop and so Küper drills him from the side so he can hold & kiss Sean at the same time.
Shifting gears Küper gets Sean to ride him and work his hole before he takes control again. Taking Sean from behind, he holds him tight and slams his hole. Sean's moans inspire Küper to pummel him to the limit, pulling out in time to coat Sean's hole with a hot load... and push it back in.
After Sean licks Küper's still-hard cock, he lies back to stroke his own cock as Küper finger him to shoot again. They kiss again still reeling and as Sean says, "It's the perfect way to end the day." I would certainly agree!