While the rest of the boys (children, really, based on this season and certainly this episode) ran straight to their Oldladies and Oldman after a flubbed job, making the situation astronomically worse for themselves and their family directly or indirectly whether they realize it or not, Jay cleaned house. He finished the job. He didn’t hesitate; there was no discussion or thought needed.
He practically did it with a smile on his face (okay, a grimace because he was mad, maybe I was the one smiling) and the only way it could have gone down any better is if he had also killed the boyfriend himself and if we had actually seen it happen.
If Jay hadn’t already come into his own after S1’s finale and proved himself a man, he certainly has in S4E8. He’s an adult now. He’s proved that he’s not only willing but also capable of surviving in this world, in the ‘life’, and is capable of doing what is necessary to survive.
Jay, my son, my boy, has officially taken control of the business and will win the ultimate “game of thrones”.